Bests & Worsts Reviews from Amazon

This is designed to clean toilets, right? I tried getting the hard water ring off my toilet. Did nothing AND scratched the toilet up so now I have a hard water ring plus the beauty of a scratched pumice stone ring. The label says that you should test a small spot and that it may scratch some porcelain. Toilets are made of porcelain. Not like you have good porcelain toilets or bad porcelain toilets. They’re all the same. If your product is designed to clean porcelain toilets, why does it scratch them? I would recommend others go with a super fine stone that does what it says.