I love this stuff! My cleaning lady (she cleans apartments I own, which can be pretty bad!) told me about using griddle screens to clean rust stains & hard water stains out of toilet bowls! Not what it was designed for, but it does a great job. I thought I may have to replace one of the toilets, but she got it all cleaned up. I've used these screens to clean the grill on my Big Green Egg; to clean baked-on grease from the bottoms of pans, and many other things. Use your imagination. . .they'll help with most any tough cleaning job.