FYI, my driver side was terrible... sun hits it more than passenger side so I definitely am one to go with the UV damage theory. I had tried the polishing thing and spent an afternoon (wasting my time) on it... looked better but crazing continued. Anyway, I bought a driver side “shell” from a wreck off fleabay, complete job including removal, swapping bulbs, ballasts to “new one” and then reinstall took about one hour. Not bad at all... and looks like night and day. I’m thinking of coating lenses with that 303 UV guard but am hesitant... Had it on old ones and still went bad.