Hard water stains if left long enough actually etch the glass. The only way to remove it is to buff it out.I have tried all of these and still have a haze on the glass. Anyone have any other ideas. Is it possible to buff it out or something?
read through this thread and pay attention to pages 4 and 5. http://www.dendroboard.com/forum/parts-construction/12562-clean-glass-last-4.html