
Do you struggle with cloudy white spots on your shower glass that just won’t budge? Those stubborn marks are caused by hard-water mineral deposits and can make your entire bathroom look dull. In this guide, you’ll discover exactly how to remove hard water stains from shower glass in five straightforward steps, using everyday household items you probably already have on hand. Say goodbye to water spots and hello to a gleaming, streak-free shower!
Why Hard Water Stains Form
Hard water occurs when your water supply contains high concentrations of minerals , mainly calcium and magnesium. If you don’t dry your shower glass after each use, water evaporates and leaves behind mineral residues that accumulate as white, cloudy spots. Over time, these hard water stains build up, become resistant to standard glass cleaners, and require acidic or abrasive products to remove.
The Effects of Hard Water on Your Bathroom Surfaces

Hard water and the minerals that compose it don’t pose any harmful health risks, but they can cause problems around the house. The effects extend beyond mere aesthetics: mineral buildup can damage your shower surfaces and plumbing. Deposits may clog showerheads and reduce water pressure, making your daily routine less enjoyable. Additionally, hard water stains can create a breeding ground for mold and mildew, which thrive in damp environments.
Materials You’ll Need
Hard water stains won’t come off with a simple glass cleaner, but with this list of products, your glass will be sparkling:
- Gloves
- Ajax cleanser: A scrub-plus-bleach powder that adds extra scrubbing power and helps tackle stubborn spots.
- Sponge
- Quality shower squeegee: To remove residual water after cleaning and prevent new stains.
- Microfiber cloth
- Acidic toilet-bowl cleaner (Zep)
- Windex
- Paper towels
How to Remove Hard Water Stains from Glass: Step by Step
Once you’ve cleared the shower area and gathered all your supplies, you can begin cleaning. Start by applying a generous amount of Ajax to your sponge.
Ajax Scrub
Dampen a non-scratch sponge, sprinkle Ajax powder over the glass, and work in gentle circular motions across the entire surface until the mineral deposits begin to lift and disappear.
Rinse and Inspect
Rinse the area with clean water and inspect. Then repeat this scrubbing action two or three times—dampening the sponge and reapplying Ajax each time—until the glass is completely clear and free of hard water stains.
Drain and Dry
After rinsing, let excess water drip off or use your squeegee to remove most of the moisture. Then thoroughly dry the surface by wiping with a microfiber towel or paper towel until no water remains, ensuring a streak-free finish and preventing new spots from forming.
Final Touch: Windex & Paper Towel
Spray Windex (or your preferred glass cleaner) over the surface and wipe away with a paper towel; you’ll achieve an extra-bright finish and glass that looks like new.
Extra Step for Stubborn Hard Water Stains
Use the Zep acidic toilet-bowl cleaner—this acid is meant for toilets but works great to remove stains that Ajax couldn’t. Be very careful around metal trim, stainless steel, or natural stone, as it’s corrosive and can etch or stain. Use at your own risk.
How to Prevent Hard Water Stains
To prevent hard water buildup in your shower, use a squeegee to dry the glass after each use—stains form as the water dries. Also, perform regular cleanings of your shower. You can even invest in a water softener, which removes the minerals that cause these stains.
Get Your Shower Gleaming Again – Contact Arion Clean Today
In this detailed guide, you’ve learned exactly how to remove hard water stains from your shower, and keep it looking crystal clear. If you’d rather leave the scrubbing to the experts, the Arion Clean team in Miami is here to help. We specialize in deep-cleaning showers, tackling even the toughest mineral deposits so your glass doors gleam like new. Ready to save time and enjoy a spotless bathroom without the hassle? Contact Arion Clean today or download our app now to book your first service and see why Miami homeowners trust us for the best shower-cleaning experience.