Spray hard water spot remover approved for use on granite, or granite cleaner formulated to remove hard water stains, on the hard water spots.
Wait the amount of time indicated on the product’s label for the remover or cleaner to break up the minerals and chemicals that make up the spots. This usually takes between 30 seconds and five minutes, depending on the cleaner and the thickness of the spots.
Rub the hard water spots and remover or cleaner from the surface with a soft, damp lint-free microfiber cloth.
Scrub away remaining tough hard water stains gently with a soft-bristled brush or nonabrasive glass-safe scrubbing pad as needed. After your remove the debris, rub the area again with additional cleaner and a damp cloth.
Rinse the surface thoroughly when finished and then dry it completely with one or more soft, absorbent microfiber cloths.