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Old 10-12-2014, 12:36 PM   #1
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Headlight Lens Fogged Up on Inside

Any suggestions on how to get inside them, how to clean them and is there any product you can use to stop this from happening again.

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Old 10-12-2014, 01:57 PM   #2
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First are you sure it's on the inside? Many times it looks like the inside but the problem is oxidation on the outside causing a milky appearance. There are several aftermarket compounds and kits that are used with a drill to polish these like new.
Another issue is condensation in the sealed unit and you can drill small hole in the bottom to let the moisture out.
Hope this helps

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Old 10-12-2014, 05:08 PM   #3
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If you actually see the water inside, you have a leak or crack in the light housing. Just depends on how much trouble you want to go through. Remove the bulb and see if you can access the inside. Some you can, and some you can't. A stick with some absorbent material swabbed around inside may work, but tie it tight. You can also remove the entire assembly and bring it inside. Again if the inside is accessible, a cleanout and if not put it in a warm place where the moisture can slowly escape Warm window sill in the hot sun.... Once you get it as clean as possible, check mold seams, edges, and bulb area for cracks and seal with anything.

By the way, to polish the outside you can buy the expensive kits in the stores or use plain old white toothpaste on a soft rag. Takes a bit of rubbing, but you'll be pleased with the smile. Just rub hard in small area until dry and wipe the haze off.
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Old 10-12-2014, 06:11 PM   #4
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Another option

If these are two piece headlite assemblies they can be separated, cleaned and re-assembled.

1. Place plastic headlight assembly in 200 degree pre headed oven.
2. Allow to warm for 10 minutes.
3. Remove from oven using pot holders.
4. The bonding glue for the two halves will be warm enough to allow separation of the two halves. (A small screwdriver will aid in separating)
5. After cooled dry and clean both halves.
6. Apply a coat of anti-fog paste to inside lens and buff ( available at most snowmobile shoppes for face shields. )
7. Reheat light assemble halves as described in step #1 and place two halves back together when re-warmed.
8. Place some weight on two halves while glue re-sets.
9. This process is not a joke. It works !

Good luck !
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Old 10-13-2014, 02:45 AM   #5
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Wow, good to know! Tomtall, thanks! Put this one in the memory banks for sure!
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Old 10-13-2014, 07:50 AM   #6
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Thanks to all for your advice I'll let you know how it goes.
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Old 10-14-2014, 08:13 AM   #7
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Or write down the numbers on the lense, google the numbers until you figure out what year and model car or truck your headlights came out of. Search Ebay or Amazon and buy a new one for less than $50 each and change it yourself.

I have heard that in some states that have a vehicle inspection, that if there is moisture in your headlights, they will not pass inspection. This happen to me in Missouri with my minivan a few years ago.

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