I have numerous windows on which I have used all conventional methods for cleaning and still have dirty-looking windows. These windows did have the old-fashioned aluminum screens--not regular storm windows and I have been told that the screen may have somehow scratched or corroded the glass. Replacing the glass is not an option since there are so many and the cost would be awful. People have suggested car buffing compounds and micromesh. Online, I found other glass restoration products. Does anyone have any experience with this?