Isn’t the foggy appearance of my headlights coming from the inside of the lens cover?

More than likely, no. Only in a small percent of foggy headlights is the cloudy appearance coming from the inside the headlight itself. Oxidation is the likely culprite to the cloudy appearance of a headlight lens. In rare occurrences, however, condensation can build up on the inside of the lens cover. Rain and a broken or faulty headlight seal is mose likely the cause. The good news is that all headlights come with vent holes and when your headlights are on, they generate a lot of heat that evaporates the moisture through the vents.