Hello together, I ask this question for a friend. She recently needed to buy a Skoda Fabia from a private provider on the Internet. Her joy, however, quickly faded away when she noticed that she has strong milky grease stains on the winshield. It is undoubtedly sunscreen and looks like the previous owner noticed the stain and tried to wipe it away, but it was only more smeared. The problem is that the stain is a We have tried it with glass cleaners, detergents and turpentine. Maybe someone knows the problem? Are there other possibilities than window-towers? Thank you very much.