Clean Hard Water Stains with Stain Solver
Stain Solver WILL NOT remove hard water or calcium stains.
You need to use white vinegar on most surfaces like countertops and plumbing fixtures. CLICK or TAP HERE to see DRAMATIC photos of how simple vinegar can remove hard water stains. SCROLL to the bottom for the best photos.
IMPORTANT TIP: White vinegar is a mild acid and it can etch and dull marble. Be careful.
For calcium and hard water stains in toilets, you need to use muriatic acid.
hard water stain