Mr. Clean launched this product but there is nothing special to the brand. These polymeric cleaning blocks are now widely available as a generic item.
Availability: These cleaning devices can be obtained widely. Just Google “magic eraser“. They should be inexpensive; if not, look elsewhere. Buy in large numbers.
Purpose: Let me repeat the hype. These things clean a wide variety of things.
Explanation: They are made of melamine foam. This nontoxic foam has been used for sound insulation among other things. When the foam is wet and compressed, it suddenly becomes a very fine, porous, sandpaper like material. So it cleans by scraping and absorbing.
Uses: There are a variety of uses. Remember to wet them and squeeze it out before use to activate it. Any type of mark on a dry board wall can be “erased.” Spots on clothing can be erased. Soap scum can be removed in showers. Granite or fake granite can be cleaned easily. Etcetera.
Problems: There aren’t many. These things will crumble away as you use them which is fine; so, if you can, use the smallest pieces possible to conserve them. Try the double thickness ones; although I have not tried them, they may hold together longer. Yes, they are yet another piece of plastic for the landfill or, hopefully not, the ocean.