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 Post subject: Don't ever do this...
PostPosted: Thu Feb 12, 2015 4:07 pm 
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In September of 2013 I purchased a brand new pair of OEM headlamps at a cost of about $1K. I was so pleased with their clean appearance, right up until I saw a small spec of dust inside the driver's side lens. I figured I was being pretty smart by using a can of the pressured air duster with the long nozzle to blow the dust away. Unfortunately, after I reinstalled the bulb and turned my headlamps on it started to smoke inside the housing. The reflective material cracked and became horribly discoloured. I didn't really think that the propellant would do that but I suppose it makes sense.

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PostPosted: Thu Feb 12, 2015 4:47 pm 
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Ouch :( the GXP headlights in my SE have that same cracking too. That chrome is ultra sensitive as well, the slightest touch with even a soft microfiber will scratch it!

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PostPosted: Thu Feb 12, 2015 4:49 pm 
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OUCH! That sucks. Thanks for the warning.

I learned a lesson with a tail lamp: Years ago a friend cleaned out a glass driving light with 90% rubbing alcohol, so that is what I used in November. Looked great for about a minute, then the clear outer cover became opaque, and cracked all over. The colored portions of the assembly were completely unaffected! Grrrrrrrr.

Dang.

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PostPosted: Thu Feb 12, 2015 4:55 pm 
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The chrome in the GXP lights appears to be much more sensitive. I have a pair of GXP reflector buckets that are absolutely trashed from being exposed to water and heat. The chrome is peeling. The only purpose left for them is if anyone wants a blacked out retrofit… Hahaha

In contrast, I found that the chrome in the normal head lights, while extremely sensitive to touch, can be cleaned without damage with a glasses cleaning cloth and some moisture from your breath.

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PostPosted: Thu Feb 12, 2015 6:20 pm 
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So what exactly happened from doing this? Did it break the foil or something causing it to come into contact with a hot bulb? I'm trying to understand how a fire started.

I've given many GM light housings a quick shot from the nozzle on my air compressor (a heck of a lot more powerful than a can of compressed air), over the years and have had zero issues whatsoever.

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PostPosted: Thu Feb 12, 2015 6:38 pm 
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Does the canned air leave residue that would cook?

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PostPosted: Thu Feb 12, 2015 6:50 pm 
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J Wikoff wrote:
Does the canned air leave residue that would cook?

Canned air is has some sort of accelerant in the can. That is most likely the culprit.

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PostPosted: Thu Feb 12, 2015 6:57 pm 
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Ahhh, got it...

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PostPosted: Thu Feb 12, 2015 11:01 pm 
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I thought the air in "canned air" could be used as a refrigerant. If that's true it would be like blowing Freon on the back side of a mirror, wouldn't it? - BC

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PostPosted: Fri Apr 02, 2021 12:55 pm 
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Most canned air is nitrous like they use to refill whip cream cans


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PostPosted: Sat Apr 03, 2021 5:48 am 
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Aerosol cans are normally filled with a propellant that won't react with whatever is to be put in it. For years hydroflourocarbon was used, much like old fashioned freon used in a/c systems. This has been outlawed in most of the world now.
I haven't any idea what is used now.
But anyway, if I see a speck of dust inside my headlamp I think I'll just leave it there.


Roger.


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PostPosted: Mon Apr 05, 2021 10:20 am 
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I've been looking for dust specks in my headlights since this was first posted back in 2015.
:poke:

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