Quote:
Originally Posted by Redbarn
if you wanna believe random info from Facebook you could try a bottle of Coke, pour it in and let it sit. Never done it but I know it works on car/cart batteries so I believe it would work on a toilet
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I've done this, make sure you use enough. I poured a 2 liter bottle in and let it sit overnight. Quick wipe around the water line and the stain was gone.