ok the car has MANY what can only be described as dried in water marks on all the windows and i really cant get rid of them. I chamios the car every wash but they havn;t subsided in the last 4-5 months ive had the car. Today i tried simoniz(sp) glass cleaner followed by autoglym glass polish but it has done nothing but show up a few scratches on the glass i never knew i had. I've been told to use methelated (purple) spirits on the glass on a cool dry night with a soft cloth. Has anyone else tried this method? or know of anything else i should try?