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.
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