So after reading and playing around i finally figured out the simplest way to remove water marks Water spot remover c-30 oxy clean spounge -the yellow and green one Gloves Cool clean glass surface Poor some product on green side of spounge and spread all around glass like getting ready to polish paint Start rubbing away...no preaure needed, just light up and down or back and forth motions. i spent 5-10 min doing one very large glass window on a ford explorer that had heavy water marking that polishing wouldnt remove. Rinse off, wipe down and look for areas i missed. as u are working the product in u can hear where there r water marks as it sounds like u r sand papering something God am i glad i finally know how to do this...