I've seen this on other GM vehicles at the Chevy dealer i work for. Dust or pollen accumulates on the inside of the headlights even with the dust covers on. I want to keep my car looking it's best but can't find anything online about this problem, and it's super annoying. I've heard of baking the headlights in the oven to peel them apart and then reseal but it's seems sketchy. Any input or thoughts on this?
Are you sure that's not just the plastic or UV coating weathering from age and outside elements? The lens might just need some rejuvenation.
Baking headlights is a thing, problem with newer cars is having an oven big enough to do it since headlight housings have only gotten larger. I have seen a couple people retrofit their headlights and whatever Cadillac used to seal them is pretty beefy stuff, not as easy to deal with as the sealant on older car's headlights. So it's doable, but you'll have your work cut out for you.
Hmm okay. You could try seeing if you can get the little straw nozzle on a compressed air can in there somewhere to at least blow it off where you can see it. I don't know if that's feasible or not, seems like more trouble than its worth maybe.
Yeah, that looks like general pitting of the headlights from use. It'll get worse over time. But, to check, you'd need to pull open the fender, pop off the dust cover and headlight bulb, and like STM says maybe blow some compressed air in (short burts so as not to freeze the plastic). That should get rid of most, but even if you just blow it around, at least it would confirm whether it's dust or just external pitting/wear.
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