How do you clean foggy headlights?

Cleaning Foggy Headlights
Fog is a description used to describe oxidation that sits on the surface of Plastic headlights. It comes from the UV layer deteriorating because of exposure to the elements. The only way to clean the headlight is to first remove the decomposed plastic then put on a new coat of protectant.

There are several ways to do this. The easiest is to have a professional come out and clean your headlight lens. The next is to purchase a kit designed for that purpose. Some kits require the use of a drill or a buffer, some do not. Search "headlight lens cleaner" on the internet for the options available. The most expensive is to replace the headlight lens.