I have tried just about everything to get the water marks off of my windows on the tahoe, I came up on this product called DRIVEN Extreme Duty Window Cleaner. I found it on amazon, figured it was worth a shot. I have tried 0000 steel wool, polishing compound, clay bar and a few other things and you couldn't even tell I had used anything.
I finally got the Driven in the mail saturday, tried it a few minutes ago, I just put some on a paper towel and rubbed it a little, wiped it off and it removed everything! Once it cools down in the next few weeks i'll be doing all of my windows! If you are having trouble with spots on your ride give it a shot, it's worth the 20.00 a bottle!
