I just bought this stuff for my girlfriend's car, and I was amazed. I remember reading on here to use a solution of vinegar and water and steel wool. I tried that and it took a lot of work, with minimal results. But I spent 15 bucks on this Diamondite stuff and a 4 dollar foam applicator pad and i was amazed at how easily the water spots came off. If anyone is hesitant to buy a product and have it not work as advertised, no need to worry about this. It works better than i expected.

Diamondite Glass Restorer

Sponge Applicator

 

kool...but whats wrong with just soap and water?

 

sorry I didn't explain well enough. I meant hard water stains, mineral deposits and bad etching in the glass from neglect. So if your windows are in bad shape this stuff works really well to get it back to new.