How to Remove Hard Water Stains From a Glass Shower Door
Hard water stains are mineral deposits, mostly calcium and magnesium, left on the glass when water dries; a mild acid such as white vinegar dissolves them, and a squeegee after every shower stops them coming back. If the cloudiness doesn’t move after a proper clean, the glass may be etched, which is damage to the surface itself and can’t be cleaned off. Here is how to tell, and what to do in each case.
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Removing the stains, step by step
1. Rinse and dry
Rinse the glass with warm water to loosen soap film, then wipe it so the cleaner isn’t diluted.
2. Vinegar soak
Spray equal parts white vinegar and warm water. Keep the glass wet for 10 to 15 minutes, spraying again as it dries.
3. Gentle scrub
Scrub with a non-scratch sponge. For heavy buildup, a paste of baking soda and water adds gentle grit.
4. Rinse and squeegee
Rinse well, squeegee top to bottom, and dry the edges and hardware with a microfiber cloth.
Still spotty? Repeat the soak, or use a cleaner made for hard water on glass and follow its label. Test anything new on a small corner first.
What not to use on shower glass
- Steel wool, scouring pads and razor blades can scratch the glass, and scratches hold minerals even faster.
- Strong acid or abrasive cleaners on coated glass. Many new shower doors have a factory protective coating. Check with the maker before using anything stronger than a mild cleaner.
- Harsh cleaners on the hardware. Acid can dull or pit the finish on hinges, handles and seals. Rinse metal parts well.
- Mixing products. Never mix bleach with vinegar or other acids.
Deposits or etching?
Run a fingernail or a clean, dry finger over the cloudy area after cleaning.
Rough and raised
Mineral deposits sitting on the glass. Keep cleaning; they will come off with time and the right cleaner.
Smooth but still cloudy
Etching. Years of minerals have dulled the surface of the glass itself. Cleaning won’t remove it.
On older doors, cloudiness can also come from failed seals or worn coatings. Worth a look.
The U.S. Geological Survey explains water hardness as the amount of dissolved calcium and magnesium in the water, which is what is left behind as scale when the water evaporates on the glass.
Keeping the glass clear
1. Squeegee every shower
About 10 seconds, top to bottom. This does more than any cleaner.
2. Leave the door open
Air flow helps the glass and seals dry faster.
3. Clean weekly
A light vinegar spray once a week stops buildup before it hardens.
4. Consider a softener
In very hard water areas, a water softener cuts spotting across the whole house.
When cleaning isn’t enough
If the glass is etched or scratched, the only fix is new glass. A new panel can be made to fit your existing hardware, or the whole door can be updated.
Hard water stain questions
More questions? Browse our glass repair FAQ or contact us.
What removes hard water stains from shower glass?
A mild acid like white vinegar, mixed equal parts with warm water and left on the glass for 10 to 15 minutes, then scrubbed with a non-scratch sponge and rinsed.
Can I use a razor blade on shower glass?
It is not worth the risk. Blades and steel wool can scratch the glass and damage factory coatings, and scratches collect minerals faster.
Why won’t my shower glass come clean?
If it is smooth to the touch but still cloudy after a proper clean, the glass is probably etched. Etching is surface damage and cannot be cleaned off.
How do I stop hard water spots on my shower door?
Squeegee the glass after every shower, leave the door open to dry, and give it a light vinegar clean once a week.
Can etched shower glass be replaced without a new door?
Often, yes. A new glass panel can usually be made to fit the existing hinges or rollers, as long as the hardware is in good shape.
Glass that won’t come clean?
Send a photo of your shower door, or call for a free estimate.