Magic Eraser is a great product. I haven't had any issues using it.
I had a spot in my grout in my laundry room that I never could remove using everything in my arsenal. (Actually, I forgot to use the Magic Eraser and I imagine it would have removed the spot). One day, after looking at that blackish spot in the grout for over a year, I tried Lime Away (in the green spray bottle). The spot immediately disappeared with no effort at all on my part. All I did was wipe it away to my jubilant surprise. it looked like the spot was never there. Limeaway isn't only for Calcium, lime and rust build up.
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