Some of you might be familiar with “Ben’s Max Formula, 100% Deet”. It comes in a little orange bottle and is made in northern NH where the mosquitoes can drain a moose of blood in record time. When you said you used Deet to dissolve the oxidation off the headlights, this is what I thought of! I work outdoors in the summer and Deet has dissolved the plastic housings of GPS units, compasses, water bottles, and other plastic pieces of field equipment! I wonder how many rounds of Deet before it melts through the headlight lens? Ha ha.