Pumie Scouring Stick 4 Pack, Heavy Duty, Remove Stains, Hard Water Rings, Rust and Paint, Carbon Buildups, by U.S. Pumice (4 Pack)

It took 3 of the for my oven and racks but they were soft yet effective. Reordered!

I've tried everything to get that calcium ring out of the toilet, but nothing worked. I saw this on Amazon while looking for Lime Away, and thought I would try it, it really works, WoW. I first would look at the YouTube video on how to use the stone before using it, it helps.

I’ve had hard water stains from n my toilet for years, always looked dirty; after a few times using this they are almost gone. I recommend this product.

I used this product to clean the inside of my stove. It did a great job with no harsh chemicals.

Ever since I moved into our home, I have struggled with this weird sticky yellow stuff on the top of our toilet bowl. Nothing would seem to get it off, and it just stayed there driving us insane.While it did take a lot of elbow grease, these pumice stones were able to remove that hard residue and now I just have to clean the bowl normally. Huzzah!It did take about 1.5 sticks to intensely scour inside the toilet, but maintenance won't take nearly as much and I anticipate a normal cleaning will use less than 1/4 of a stone.I am glad I found these and will definitely continue using them.