don't use regular wax (that's for the body). There are products you can purchase, any brand will do. They will say something like "plastic cleaner" or something along those lines. Just use the amount the product says to use, rub it in cirlces on the headlights, and wipe off a few minutes later, again in circles. Make sure you use a terry cloth type towel that is new, or designed to be used on cars because you will have to really rub hard to get the wax off. The headlights scratch easily so just don't be too aggressive.