These freaky sponge-like things will clean all of those weird spots that you just don't know what they are. Case in point: I get this strange shadowing where my garbage can is. I don't know what it's from, exactly. I've tried everything to wash it off. Soap and hot water, Scrubbing Bubbles, window cleaner... nothing worked, except for the Magic Erasers!
You know that grey/black stuff you get on your walls where you touch them often, or your fridge, or your door. They get rid of that, too. Those nasty spots that make your house look gross, and make your parents and married friends call you a lazy single slob? They're gone, with ease!
Cleaning isn't reserved for families, we just need to clean less often ;).