If your water tastes like it's been sitting in an old frying pan and your white laundry has acquired an orange-ish "patina," you have rusty water, otherwise known as water with a lot of iron in it.

Our bathrooms are like a magnet for stubborn stains. No matter how often you clean, hard water spots, rust, and soap scum always seem to make a comeback. If you’ve ever spent half an hour scrubbing ...