Remove Hard Water Stains from Shower Glass

The mistake most people make: using regular glass cleaner. Hard water stains are mineral deposits (calcium and magnesium) — they need an acid to dissolve, not a surfactant. Windex won't touch them.

Step 1 — Try the Free Fix First (mild stains)

1. Mix equal parts white vinegar and water in a spray bottle.
2. Spray generously on the glass and let it sit 15–30 minutes (don't let it dry — reapply if needed).
3. Scrub with a non-scratch sponge in circular motions.
4. Rinse thoroughly with warm water and dry immediately with a microfibre cloth to avoid new spots.

Step 2 — Stubborn Stains (buildup over months)

1. Make a paste of baking soda + white vinegar (it will fizz — that's the reaction working).
2. Apply paste directly to stains with a sponge or old toothbrush.
3. Let sit 10 minutes, then scrub and rinse.
4. For thick soap scum mixed in, add a few drops of dish soap to the paste.

Step 3 — Heavy or Neglected Stains (years of buildup)

1. Use a commercial hard water remover like CLR or Bar Keepers Friend — these contain stronger acids (lactic acid / oxalic acid) that attack deep mineral layers.
2. Apply with a damp sponge, scrub with a white nylon scrub pad (NOT steel wool — it scratches glass).
3. Rinse completely and neutralize with a baking soda + water wipe if using CLR.
4. For extreme cases, a razor blade scraper held at 45° can carefully lift mineral crust from flat glass — go slowly and keep the glass wet.

Prevention (so you never do this again)

• Squeegee the glass after every shower — takes 10 seconds and prevents 90% of buildup.
• Apply a rain repellent treatment (like Rain-X) every few months — water beads off and minerals don't bond.
• A whole-home or showerhead water softener filter significantly reduces mineral content at the source.

Pro tip: Bar Keepers Friend (powder form) is the cult favourite among professional cleaners — it's gentler than CLR but works on glass, tile grout, and fixtures all in one. Keep a canister under the sink. Works on stainless steel too.