"Barkeeper's Friend"
 

I'm always skeptical of products and hype, but Barkeeper's Friend is phenomenal for cleaning windows, and even the plastic tail lights. I've had my car for a few years, and I've never REALLY cleaned the outside of the window glass, except for the usual washing, but I scrubbed it first after with some BK's Friend, and the glass is amazing looking; the water even beads up like it was a fresh Zaino or wax job. If you like your car looking good, you owe it to yourself to get some of this stuff. 5 ***** stars out of 5 *****!!

Re:
 

does it remove water spots?

Re:
 

Where did you get it from?

Re:
 

I didn't have waterspots, but I think that if anything would work on that, this product is it.

Not all supermarkets seem to carry this stuff, but Wal-Mart or K-mart ussually have it.