I have been washing our vehicles for over 55 years and I have yet found a product that cleans the glass. I generally use the standard Windex and paper towels and in the shade the glass looks good but ...
Put me in the Invisible Glass category. I'm generally terrible at cleaning windows and this stuff does better than anything else I've tried over the years. As someone who smokes in my pickup, not the sticks and bricks, DW's car or the motorhome, I get alot of practice cleaning glass.