What’s the best way to clean foggy car headlights?

Get some mosquito spray with DEET.

Use a soft cloth and wipe them clean.

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if you sand and refinish your lens then you will constantly be reding every few months when it fades again

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UV protector helps. But for the $15 the kit coats, I don't mind redoing it every once and a while vs buying new headlights. It takes 10 minutes.

Toothpaste and a green scrub pad

Acetone on an old towel and start scrubbing. You'll have to use a fair amount of pressure, but it works. Not sure how long it will last.

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UV protector helps. But for the $15 the kit coats, I don't mind redoing it every once and a while vs buying new headlights. It takes 10 minutes.

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om my truck it takes less then 10 minutes to replace the whole light assembly and they only cost $38 each

new replacements will last about 5 yrs before they start getting dull, but to each his own, whatever yoiu feel is best for you

A dual action polisher with a high-cut pad and high-cut compound will help. I worked with a detailer buddy of mine back in the day and this usually worked. The harder buildup would require a wet sanding.

But as someone else said, easier to just replace the entire housing. Save yourself the headache.

Get some mosquito spray with DEET.

Use a soft cloth and wipe them clean.
Watched a Mexican guy do this last week in the parking lot of his restaurant.
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My truck lenses were in bad shape. They still look good months later. I may have to touch them up before long, but it sure as hell works.

I used an old tee shirt and wiped them horizontially a couple of times. The DEET I used was 40%.

I just ordered new headlights for my 06 Silverado since they are fogged up on the inside and can't be cleaned.

Cost me $85 from Parts Geek with free shipping.

Hammer