I have a weird haze/fog/film that suddenly has developed on the OUTSIDE of my windshield...It is only visible when it rains and it makes the outside seem like there is a weird fog, similar to what you would get on the inside...I have tried almost everything that I know...including scraping with a razor blade, vinegar and water, commercial window cleaners, new blades, mineral spirits, ect... nothing seems to fix it...Any help?