🌿 How to Remove Hard Water Stains From Taps and Glass

You wipe the shower screen until it gleams, and once it dries the cloudy spots are back. Meanwhile the base of the tap is wearing a crusty white ring.

Here's how to lift those hard water marks from glass, taps and sinks without dulling the finish, with a table worth saving at the end.

Why the spots keep coming back

Hard water carries dissolved calcium, often magnesium too. Each drying droplet leaves a chalky film, mostly calcium carbonate. Acid dissolves it; the fizz is carbon dioxide escaping.

My house rules for limescale

Café sink or home bathroom, same list. Each rule was earned the hard way.

1. Glass gets vinegar, diluted. Mix white vinegar half and half with water, spray, wait a few minutes, wipe with a soft cloth.
2. Taps don't get vinegar. Grohe and hansgrohe both warn that vinegar can leave the finish dull. Use soap on a damp cloth; for scale, a mild citric-acid cleaner.
3. Spray the cloth, not the tap. Hidden tip: hansgrohe says not to spray cleaner straight onto a fitting. Wet the cloth instead and work it into the joints.
4. Cotton only on chrome. Hidden tip: hansgrohe counts even microfibre cloths and baking powder as too abrasive for taps. Old cotton tea-towel squares are perfect. Sorry, bicarb.
5. Soak the aerator. Unscrew the spout's mesh tip and soak it in warm water with a little citric-acid cleaner for about ten minutes.
6. Nothing scratchy, anywhere. Steel wool, scouring powder and rough sponges scratch glass and steel. On stainless sinks, Blanco suggests vinegar diluted one to ten, wiped along the grain.
7. Stone gets no acid. Marble and limestone are acid-sensitive; vinegar etches dull patches cleaning won't shift. Use a pH-neutral stone cleaner.
8. Never mix acid with bleach. Bleach meeting any acid, vinegar included, releases chlorine gas. Use one product at a time and rinse between them.
9. Rinse, then dry. A squeegee down the glass after each shower and a quick wipe of the taps stop new spots forming.

The rule I break

Full disclosure: I skip the squeegee roughly weekly, usually when running late. The screen always tells on me. Every time.

Your copy

Keep just one? Rule 9, because drying stops the spots before they start and turns the vinegar, the citric acid and all the scrubbing into occasional jobs instead of a weekly battle.

Cheat sheet: hard water stains

Rule 10 is yours to write. Tell me what it is.