My 2018 w/ LED headlights has developed interior fogging over the past 2 years (slowly increasing, not dependent on weather and I haven't replaced parking light bulbs). This fogging is definitely on the inside and in both headlights as I have used an exterior polishing kit recently (Cerakote ceramic headlight restoration kit) and could see an effect on the outside surface with no effect on the fogging. My LC lives outside in the NM sun, so there is no shortage of UV, but I would find it odd that UV damaged the interior and not exterior. Has anyone experienced similar interior fogging? On my 5th Gen 4Runner I would experience condensation if the bulb cover seal failed and we had high humidity conditions (pretty rare here). I tried pulling the parking light bulb and blowing compressed air into the assembly with no improvement. I am contemplating removing the headlights and trying to inject an alcohol solution in and swishing it around the interior lens surface before drying out again. At night, with the headlights on, I have light diffraction from the fogging which irritates me, but probably doesn't diminish illumination effectiveness too much. I bought this as a Toyota certified used vehicle in 2020, and headlights are explicitly listed as not covered under the warranty. A couple pics: