The previous owner of my car must didn't dry the windows after they washed the car. There are what seem to be permenent water spots on my windows. I've washed the car 4 times now, paying extra attention to the windows. I've used everything just about on them, and still no change. Does anybody have any ideas that will help this situation. I'm trying to steer clear of buying a bottle of cleaner that costs $8 and it doesn't work either.