I have an issue with my wiper blades dragging across the windscreen. Tried every type of blade from cheap of the cheap to $20 buck blades; No luck. A body man that I know suggested trying out a clay bar to "clean" the windshield...Has anyone ever heard or tried this? Or does anyone have any other suggestions. I've clean the crap out of the windshield with different types of glass cleaners and used different types of clothes from old sucks to newspaper stock to microfiber towels. (I use a bug wash with a "rain X" type substance in it if that makes it difference to anyone.