How to Remove Hard Water Spots from a Glass Shower Door

1. Fill a spray bottle with undiluted white vinegar.
2. Spray the vinegar generously over the affected areas of the glass.
3. Let it sit for 5–10 minutes. For heavier buildup, you can leave it on longer (up to 15 minutes), but don't let it dry completely.
4. Scrub gently with a soft microfiber cloth or a non-abrasive sponge. Use circular motions to lift the spots.
5. Rinse thoroughly with warm water.
6. Dry the glass with a clean, dry microfiber cloth to prevent new spots from forming.

If the spots are stubborn, you can repeat the process or move to the baking soda method below.

Method 2: Baking Soda Paste (for Stubborn Spots)

Baking soda is a gentle abrasive that helps scrub away mineral deposits without scratching glass. Combine it with vinegar for a fizzy reaction that can help lift stubborn buildup.

1. Mix 1/2 cup baking soda with 3–4 tablespoons of white vinegar to form a thick paste. (Add more vinegar if needed to reach a spreadable consistency.)
2. Apply the paste to the spots using a soft cloth or your fingers (wear gloves if you prefer).
3. Let it sit for 10–15 minutes.
4. Gently scrub the spots with a soft cloth or sponge, using small circular motions.
5. Rinse thoroughly with warm water.
6. Dry the glass completely with a clean microfiber cloth.

For very stubborn spots, you can use a plastic scraper or an old credit card to gently scrape the softened mineral deposits. Hold the scraper at a low angle to avoid scratching the glass.

What Not to Do

• Avoid using abrasive scrubbers like steel wool or harsh scouring pads—they can scratch the glass permanently.
• Don't use acidic cleaners on glass that has a tinted or coated finish (like some low-E glass) unless the manufacturer approves. Vinegar can damage certain coatings.
• Never mix vinegar with bleach or other household cleaners—this can create toxic fumes.
• Don't let vinegar or baking soda dry on the glass; it can leave a residue that's harder to remove.

Fresh vs. Dried Spots

Fresh hard water spots (from recent splashes) are usually just a thin film. A quick wipe with a vinegar-soaked cloth often does the trick. For dried or set-in spots, you'll need the full vinegar soak or baking soda paste method, and you may need to repeat the process a few times.