Hard water residue can leave flakes and spots on kitchen and bathroom surfaces that are exposed to moisture.This residue is a result of a high concentration of chemicals--namely magnesium and calcium--in the water. Luckily you can remove unsightly residue left by these minerals. You don't even have to spend a lot of money on harsh cleaners. You can use inexpensive, gentle products that you may already have right at home.
Fill a plastic spray bottle half full of white vinegar. Fill the bottle the rest of the way up with water.
Screw the nozzle onto the spray bottle and shake the bottle gently to mix the ingredients.
Spray the mixture directly onto hard water stains.
Rub the stains away with rags. For tougher stains, you may need to use a nylon-bristled scrub brush. Toothbrushes can be useful in small areas that aren't easily accessible.
Rinse thoroughly. Wipe the area dry if necessary.