Eco-Friendly Toilet Cleaning Stone Block with Handle - Powerful Bathroom Scrubber for Stains & Limescale Removal | Ideal for Toilet Bowls, Sinks & Tiles

This product works exactly as described. I’ve been trying to remove some blue copper stains from my sink and toilet for over a year and nothing worked. They came out with a few minutes of wet scrubbing and are both back to sparkling white. The porcelain is not damaged at all.The product slowly erodes as you use it and shapes to the surface you are working on. It’s absolutely fantastic and even better has no chemicals! I strongly recommend this any household with well water to get rid of deposits.Unsuccessful methods I tried prior to this were: bleach, magic eraser, barkeepers friend, softscrub and baking soda. All had no noticeable difference. This product blew them all away! Buying more now.