I read somewhere that you could use clay on windows/glass. I tried it and WOW! what a difference! I'll bet my '95 Passport's windows haven't been this clean since it left the factory!
If you think your glass is clean, try the Baggie test and you'll probably find it as rough as course sandpaper. Clay a section and re-Baggie. I think you'll be very impressed.
If you think your glass is clean, try the Baggie test and you'll probably find it as rough as course sandpaper. Clay a section and re-Baggie. I think you'll be very impressed.