Last week we were on vacation in Vermont and when we got home I washed the GP. When I was cleaning the head lights I saw a film on them I cannot get off, at first I thought it was a tree sap but it is on both headlights and it is not coming off without scraping it off. It is almost like they were treated with something from the factory. Has anybody else ever seen or had this problem? We purchased the car new in 2005 from the dealer with 6 miles on it so it was not used. Thanks for any help and information.