Put some vinegar on it and wait a few minutes or maybe even a few hours then scrub it. You won't believe the result. (09/26/2007)
By M from Iran
There is a product called Lime Away that may work. Then there is another thing that you can rub on the surface, and I don't remember what it is called. It is like a porous rock. When you use it disintegrates as you rub on the surface. I have used it on my toilet bowls to get off stains from hard water. It worked for me. (09/26/2007)
Barkeepers friend scouring powder and a bit elbow grease always works and is cheap. (09/26/2007)
Thanks for the feedback. I tried the vinegar and lime away and neither worked. Is there some substitute for barkeepers friend? I have looked for it and can't find it. (10/04/2007)
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