How to Remove Hard Water Stains From Glass

[Mugwump]

Hard water stains appear as white, hazy spots on glass surfaces. This is due to a build-up of alkaline and other minerals in your water. While these stains are notoriously tough to remove, there are several cleaning and prevention methods that can help get your glass back into sparkling condition.

http://m.wikihow.com/Remove-Hard-Water-Stains-From-Glass

[LizStreithorst]

Nothing works better than dampened 1400 grit sand paper.