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Why one should not leave fingerprints on bulbs and plugs?
How should the lights for a trailer be hooked up?Oil leaking from spark plug socketVolvo V60 Daytime Running Light - what is the bulb type? Instructions to replace bulb? Or what relay/fuse to replace?How does a lightbulb with two filaments know which one to light up?Plugs: One side dirty, one side clean?Stubborn rear fog light (BMW E46)Single reverse light on Dacia SanderoShould I use lubricant or not when installing these spark plugs?Black Spark Plugs that Clean ThemselvesOil Pressure Sensor
I have read that one should not leave greasy fingerprints on their spark plugs or on their light bulbs. Why is this a thing? On what else one should not leave fingerprints? How does one avoid leaving fingerprints (latex gloves or, say, cleaning the light bulb after putting it in)? How do you clean your fingerprints if you leave any?
sparkplugs lights
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
add a comment |
I have read that one should not leave greasy fingerprints on their spark plugs or on their light bulbs. Why is this a thing? On what else one should not leave fingerprints? How does one avoid leaving fingerprints (latex gloves or, say, cleaning the light bulb after putting it in)? How do you clean your fingerprints if you leave any?
sparkplugs lights
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
4
What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
4
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39
add a comment |
I have read that one should not leave greasy fingerprints on their spark plugs or on their light bulbs. Why is this a thing? On what else one should not leave fingerprints? How does one avoid leaving fingerprints (latex gloves or, say, cleaning the light bulb after putting it in)? How do you clean your fingerprints if you leave any?
sparkplugs lights
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
I have read that one should not leave greasy fingerprints on their spark plugs or on their light bulbs. Why is this a thing? On what else one should not leave fingerprints? How does one avoid leaving fingerprints (latex gloves or, say, cleaning the light bulb after putting it in)? How do you clean your fingerprints if you leave any?
sparkplugs lights
sparkplugs lights
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
edited Mar 18 at 15:37
Baran Zadeoglu
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
asked Mar 15 at 14:38
Baran ZadeogluBaran Zadeoglu
165112
165112
4
What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
4
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39
add a comment |
4
What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
4
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39
4
4
What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
4
4
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39
add a comment |
3 Answers
3
active
oldest
votes
Why is this a thing?
For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way materials expand when heated this means you get different parts of the bulb expanding at different rates and... crack.
Where the bulbs are made from quartz glass (such as in certain more powerful bulbs from some manufacturers) there is also the issue of devitrification - where the oils/salts left behind in the finger print can potentially cause the material to weaken although typically car bulbs aren't going to get hot enough for this to occur although some fogging of the glass may occur.
On what else one should not leave finger prints?
Probably a bit broad to answer here I'm afraid.
How does one avoid leaving finger prints (latex gloves or cleaning say the light bulb after putting it in)?
Yep clean latex gloves (cotton gloves are even better if you have them - but latex or nitrile works just fine) or a holding the bulb in a clean cloth works.
How do you clean your finger prints if you leave any?
You can clean them afterwards as well, a good wipe down with a clean microfibre cloth will do the job.
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
|
show 11 more comments
Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal.
If you foul the plugs with dirt or grease then clean them before use. Any dirt on the electrode is going to end up in your cylinder!
For halogen lights @Motosubatsu's answer is pretty comprehensive, I would only add to be careful if handling with facial tissues (i.e. Kleenex), which some people do. Some types of tissues have been treated with moisturizers which will contaminate the bulb and cause the same issues as fingerprints. Toilet tissue generally doesn't, neither do paper towels.
answered Mar 15 at 14:56
GdDGdD
5,6881126
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
add a comment |
Despite the two previous answers stating that fingerprints on spark plugs are not a problem, I'll mention that they are.
I have personally replaced plug wires that showed traces of carbon where the spark was "leaking" around the plug due to grease on the plug ceramic. This is especially apparent on aftermarket ignition systems with higher voltage and lightly-coloured (orange) plug wires. Granted these were vehicles modified for competition twenty years ago, however today's ignition systems are on par with those for voltage.
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
add a comment |
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
Why is this a thing?
For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way materials expand when heated this means you get different parts of the bulb expanding at different rates and... crack.
Where the bulbs are made from quartz glass (such as in certain more powerful bulbs from some manufacturers) there is also the issue of devitrification - where the oils/salts left behind in the finger print can potentially cause the material to weaken although typically car bulbs aren't going to get hot enough for this to occur although some fogging of the glass may occur.
On what else one should not leave finger prints?
Probably a bit broad to answer here I'm afraid.
How does one avoid leaving finger prints (latex gloves or cleaning say the light bulb after putting it in)?
Yep clean latex gloves (cotton gloves are even better if you have them - but latex or nitrile works just fine) or a holding the bulb in a clean cloth works.
How do you clean your finger prints if you leave any?
You can clean them afterwards as well, a good wipe down with a clean microfibre cloth will do the job.
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
|
show 11 more comments
Why is this a thing?
For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way materials expand when heated this means you get different parts of the bulb expanding at different rates and... crack.
Where the bulbs are made from quartz glass (such as in certain more powerful bulbs from some manufacturers) there is also the issue of devitrification - where the oils/salts left behind in the finger print can potentially cause the material to weaken although typically car bulbs aren't going to get hot enough for this to occur although some fogging of the glass may occur.
On what else one should not leave finger prints?
Probably a bit broad to answer here I'm afraid.
How does one avoid leaving finger prints (latex gloves or cleaning say the light bulb after putting it in)?
Yep clean latex gloves (cotton gloves are even better if you have them - but latex or nitrile works just fine) or a holding the bulb in a clean cloth works.
How do you clean your finger prints if you leave any?
You can clean them afterwards as well, a good wipe down with a clean microfibre cloth will do the job.
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
|
show 11 more comments
Why is this a thing?
For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way materials expand when heated this means you get different parts of the bulb expanding at different rates and... crack.
Where the bulbs are made from quartz glass (such as in certain more powerful bulbs from some manufacturers) there is also the issue of devitrification - where the oils/salts left behind in the finger print can potentially cause the material to weaken although typically car bulbs aren't going to get hot enough for this to occur although some fogging of the glass may occur.
On what else one should not leave finger prints?
Probably a bit broad to answer here I'm afraid.
How does one avoid leaving finger prints (latex gloves or cleaning say the light bulb after putting it in)?
Yep clean latex gloves (cotton gloves are even better if you have them - but latex or nitrile works just fine) or a holding the bulb in a clean cloth works.
How do you clean your finger prints if you leave any?
You can clean them afterwards as well, a good wipe down with a clean microfibre cloth will do the job.
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
Why is this a thing?
For bulbs it is - spark plugs don't care. The problem with getting fingerprints on bulbs (specifically halogen-type bulbs) is actually the grease that gets left behind - the bulb will get quite hot when lit and grease on a portion of the bulb will cause differences in the rate of heating on the bulb surface and thanks to the way materials expand when heated this means you get different parts of the bulb expanding at different rates and... crack.
Where the bulbs are made from quartz glass (such as in certain more powerful bulbs from some manufacturers) there is also the issue of devitrification - where the oils/salts left behind in the finger print can potentially cause the material to weaken although typically car bulbs aren't going to get hot enough for this to occur although some fogging of the glass may occur.
On what else one should not leave finger prints?
Probably a bit broad to answer here I'm afraid.
How does one avoid leaving finger prints (latex gloves or cleaning say the light bulb after putting it in)?
Yep clean latex gloves (cotton gloves are even better if you have them - but latex or nitrile works just fine) or a holding the bulb in a clean cloth works.
How do you clean your finger prints if you leave any?
You can clean them afterwards as well, a good wipe down with a clean microfibre cloth will do the job.
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
edited Mar 15 at 16:39
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
answered Mar 15 at 14:45
motosubatsumotosubatsu
5,21511029
5,21511029
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
|
show 11 more comments
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
4
4
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
If you don't have glove or a clean cloth, a paper towel works good as well. The ultimate here would be to use cotton gloves, but they aren't nearly as prevalent as latex or nitrile gloves are.
– Pᴀᴜʟsᴛᴇʀ2♦
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
Clean halogen lights using a glass cleaner, make sure it's dry before you turn it on, that should only take a minute.
– GdD
Mar 15 at 14:51
1
1
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
Rubbing alcohol works well if you have touched the bulb.
– David Watson
Mar 15 at 14:52
1
1
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
@GdD once the glass part of the bulb is inside the headlight unit then removing the foam cover from the glass will be challenging... I have always managed to get halogen bulbs fitted by just holding the metal or plastic parts...
– Solar Mike
Mar 15 at 15:15
1
1
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
It depends on the car I guess @SolarMike.
– GdD
Mar 15 at 15:19
|
show 11 more comments
Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal.
If you foul the plugs with dirt or grease then clean them before use. Any dirt on the electrode is going to end up in your cylinder!
For halogen lights @Motosubatsu's answer is pretty comprehensive, I would only add to be careful if handling with facial tissues (i.e. Kleenex), which some people do. Some types of tissues have been treated with moisturizers which will contaminate the bulb and cause the same issues as fingerprints. Toilet tissue generally doesn't, neither do paper towels.
answered Mar 15 at 14:56
GdDGdD
5,6881126
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
add a comment |
Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal.
If you foul the plugs with dirt or grease then clean them before use. Any dirt on the electrode is going to end up in your cylinder!
For halogen lights @Motosubatsu's answer is pretty comprehensive, I would only add to be careful if handling with facial tissues (i.e. Kleenex), which some people do. Some types of tissues have been treated with moisturizers which will contaminate the bulb and cause the same issues as fingerprints. Toilet tissue generally doesn't, neither do paper towels.
answered Mar 15 at 14:56
GdDGdD
5,6881126
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
add a comment |
Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal.
If you foul the plugs with dirt or grease then clean them before use. Any dirt on the electrode is going to end up in your cylinder!
For halogen lights @Motosubatsu's answer is pretty comprehensive, I would only add to be careful if handling with facial tissues (i.e. Kleenex), which some people do. Some types of tissues have been treated with moisturizers which will contaminate the bulb and cause the same issues as fingerprints. Toilet tissue generally doesn't, neither do paper towels.
answered Mar 15 at 14:56
GdDGdD
5,6881126
Fingerprints on spark plugs aren't a thing, the natural oils on your skin won't affect their operation. If, however, your fingers are covered in car grease or dirt when you handle the plugs then that can cause issues, either interfering with the electrode or the cable connection to the plug terminal.
If you foul the plugs with dirt or grease then clean them before use. Any dirt on the electrode is going to end up in your cylinder!
For halogen lights @Motosubatsu's answer is pretty comprehensive, I would only add to be careful if handling with facial tissues (i.e. Kleenex), which some people do. Some types of tissues have been treated with moisturizers which will contaminate the bulb and cause the same issues as fingerprints. Toilet tissue generally doesn't, neither do paper towels.
answered Mar 15 at 14:56
GdDGdD
5,6881126
edited Mar 15 at 15:24
answered Mar 15 at 14:56
GdDGdD
5,6881126
answered Mar 15 at 14:56
GdDGdD
5,6881126
answered Mar 15 at 14:56
GdDGdD
5,6881126
5,6881126
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
add a comment |
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
1
1
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I would say even tissues without moisturizers would be a bad idea. The oils from your fingers would probably go right through a normal tissue
– Aethenosity
Mar 15 at 21:48
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
I tend to use the cardboard box the lamp came in. I figure its clean enough for the lamp's glass for transit - its clean enough for the install. Yet another reason why plastic blister packaging sucks.
– Criggie
Mar 16 at 20:53
add a comment |
Despite the two previous answers stating that fingerprints on spark plugs are not a problem, I'll mention that they are.
I have personally replaced plug wires that showed traces of carbon where the spark was "leaking" around the plug due to grease on the plug ceramic. This is especially apparent on aftermarket ignition systems with higher voltage and lightly-coloured (orange) plug wires. Granted these were vehicles modified for competition twenty years ago, however today's ignition systems are on par with those for voltage.
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
add a comment |
Despite the two previous answers stating that fingerprints on spark plugs are not a problem, I'll mention that they are.
I have personally replaced plug wires that showed traces of carbon where the spark was "leaking" around the plug due to grease on the plug ceramic. This is especially apparent on aftermarket ignition systems with higher voltage and lightly-coloured (orange) plug wires. Granted these were vehicles modified for competition twenty years ago, however today's ignition systems are on par with those for voltage.
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
add a comment |
Despite the two previous answers stating that fingerprints on spark plugs are not a problem, I'll mention that they are.
I have personally replaced plug wires that showed traces of carbon where the spark was "leaking" around the plug due to grease on the plug ceramic. This is especially apparent on aftermarket ignition systems with higher voltage and lightly-coloured (orange) plug wires. Granted these were vehicles modified for competition twenty years ago, however today's ignition systems are on par with those for voltage.
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
Despite the two previous answers stating that fingerprints on spark plugs are not a problem, I'll mention that they are.
I have personally replaced plug wires that showed traces of carbon where the spark was "leaking" around the plug due to grease on the plug ceramic. This is especially apparent on aftermarket ignition systems with higher voltage and lightly-coloured (orange) plug wires. Granted these were vehicles modified for competition twenty years ago, however today's ignition systems are on par with those for voltage.
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
answered Mar 17 at 10:13
dotancohendotancohen
1,4412917
1,4412917
add a comment |
add a comment |
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What else should one not leave finger prints on? Wow, it's a pretty extensive list, but I'd say bank vaults and murder victims unless you had a pretty good justification for why they were left there. A lawyer might have a more comprehensive list! And one that amuses the geek in me: high vacuum equipment. Finger grease outgasses, and with scientific grade vacuums, that can actually slow the process of pumping it down because you create a gassious atmosphere of fingerprint that takes forever to finally pump out.
– Cort Ammon
Mar 15 at 16:05
4
@CortAmmon Please clarify. Do you mean that one should sand down the fingertips of the person one has just murdered, or that one should avoid leaving one's own prints on them? I, er, ... my friend -- definitely my friend -- needs to know this. Quite urgently, actually.
– David Richerby
Mar 15 at 16:39