This long-forgotten gem of a cleaning agent may be used with a little water or vinegar to lift even the most stubborn stains. Unattractive grout driving you batty? Mold and mildew stains got you reaching for the Prozac? Burner pans and casserole dishes giving you fits? Cream of Tartar is your new best friend.
Keep one in the shower filled with a mixture of half vinegar and half Dawn dishsoap. Use it to wipe down the shower while you are in there and your shower will always be clean. I keep hearing that this is the magic formula!