Recently I was reminded of the power of the Mr. Clean Magic Eraser. I had been searching for two years on how to get the stains off of my cast iron bathtub. Then I saw someone on Youtube do a video on how the Mr. Clean Magic Eraser cleaned her tub. I tried it and wow! All I did was wet the sponge and then wiped all the stains off. No other method or cleaner could do that. I was amazed!