[shifty]

There is this stuff at the store called Spot-X, think it's made by the same people who make Rain-X. You will absolutely not believe how well this stuff works. It is worth the $12-18 you will pay for the bottle and you won't be able to find enough uses for it. I found out about this stuff living in central FL and having glass shower doors in all the bathrooms in the house. The scaley water spots wiped off when nothing else would work. Then I found it works on cars and the outside of the house's windows (from sprinklers and crap), even removed the rust stains from the wall (water was heavy in iron)