How to remove hard water stains anywhere.
Hard water stains are mineral deposits left behind when water evaporates. Scrubbing barely touches them because the problem is chemical: you need a mild acid to dissolve the minerals.
Remove hard water stains by applying white vinegar to the deposit and giving it dwell time to dissolve the minerals, then scrubbing lightly and rinsing. For faucets and fixtures, wrap them in vinegar-soaked paper towels or a bag of vinegar for 15 to 30 minutes. For heavy limescale, a baking soda paste adds gentle abrasion. Prevent it by drying surfaces after use.
Why minerals need acid
Hard water stains are calcium and magnesium left behind by evaporating water. Acid converts them to something that wipes away; abrasion alone just scratches.
- White vinegar is the cheap, safe acid for the job
- Give it time — minerals do not dissolve instantly
Faucets and fixtures
Awkward shapes need the acid held against them.
- Soak paper towels in vinegar and wrap the fixture, or tie a vinegar-filled bag around the faucet head
- Leave 15-30 minutes
- Scrub with an old toothbrush, rinse and buff dry
Glass and tile
Same principle, larger surface.
- Spray vinegar or press vinegar-soaked towels to the area, dwell 10-15 minutes
- Scrub with a non-scratch pad; add baking soda paste for heavy spots
- Rinse and dry
Prevent it returning
Stains form where water sits and evaporates. Drying or squeegeeing surfaces after use is the only true prevention.