Clean headlights.

[b18cek]

bake them in the oven at very low temp. Then pry them apart from the silicone sealant. Then clean them/wet sand if needed.

 

[Murderedoutdsm]

I used a heat gun on it's lower setting to heat up the seal and pry them apart. It's safer to do it that way so you can have more control, don't cook the wiring, or distort the lense. I personally messed up a set of headlights doing the oven method, so I'm partial. While I had them apart for cleaning I decided to paint the housing interior gloss black, and exterior flat black. Looks much cleaner.

 

[Speedemon636]

I just use 3M's polishing compound and an electric buffer. Then once I get it clean, I just spray clear coat over it to keep it from retuning to a foggy look.

 

[BCDSMatt]

Wow MurderedoutDSM those look brand new, Nice work.

 

[Auto RS T]

Wow MurderedoutDSM those look brand new, Nice work.

Those are not factory lenses on those housings. FYI

 

[TheWanderer]

Best $20 you'll ever spend:

Meds Restorem

You can get it through these guys HERE. Ask for Wil or Dave and tell them you are a member here at DSMtuners and would like the club discount.

I've personally used this, among other methods, to clear out faded plastic lights on everything from Subaru's to PT Cruisers, and it by far blows every other method out of the water. Did it on my friends 99 Grand Cherokee last winter (Oct. 2011), and its just now starting to fade out. Each kit says it will do 2 vehicles (4 lamps total) however we have managed to do 4 lamps per package (~4 vehicles per kit). I'll never go back to the buffer/polish method or any of the other cheaper $5 harbor freight/wal mart style kits again.

 

[hunkajunk]

I agree the heat gun is safer than the oven if you have never done it before

 

[SweetSandMan]

Bake open.
Clean.
Re-seal.

Or buy new headlights for cheap on eBay.