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Hi guys!
I could not find any DIY section so I hope posting here is fine!
I need you because I have to deal with the scourge of all headlights… BLURRY HEADLIGHTS!

I did not pay attention to my headlights and now they are all dirty, I tried cleaning them with toothpaste and a brush as a friend told me but it failed and I really have to get it done: It would be dangerous to drive without them being spotless… any tips? I am getting really desperate…

Also, if anyone knew how to protect my headlights so it does not happen again, I’d love them to share with me!

 
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600 grit wet sand with light touch followed by a clear coat spray of polyurethane.

A less lasting option: any well reviewed commercial brand treatment.

If condensation is being formed inside headlight housing only a new or used replacement will fix it.

 
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I use the meguiars kit and it works really well, not a permanent fix, been a year and they're starting to get foggy again. Think I'm going to clear coat them this time

 
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Most "cheap" clear coats don't last very well either.

I seem to recall a spray can of 2K clear coat available on the market. I think eastwood carried it, but likely available through other sources. The can was about $20 US and once "opened" it had a shelf life of 48 hours, but it was a proper hard strong clear instead of soft spray can clear coat.

That is what I am using when I redo the headlamp housings on the wifes MDX.

found it on amazon

 
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so many products around for that that i do not even know which to recommend

clear coat afterwards helps.

 
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my aunts CRV:


i have been getting 4+ years out of using $5 clear lacquer spray paint from the hardware store. this is illinois, might be less somewhere like florida. krylon makes a clear with a UV blocker which i would expect to work good.

i just sand with 400 grit wet with a drop of dish soap, dry thouroughly, wipe with mineral spirits or similar, and spray on several coats of clear. i like to do a light misting followed by 3 wet coats. if you paint them on a humid day, the clear will have a white milky haze, so pick a non-humid day.

 
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+1 for meguiars