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How to Remove Hard Water Stains from Windows

Hard water stains are white spots that are left on surfaces like window glass after hard water dries on it. In today’s post, local replacement window company Renewal by Andersen® of Memphis shares a quick guide on how to remove hard water stains.

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What Causes Hard Water Stains?

Hard water is water that contains calcium, magnesium and other minerals. These minerals remain on the surface after the water dries, forming hard water stains that are especially visible on dark or reflective surfaces. Tap water in many areas often has high levels of such minerals. It’s harmless, but it’s important to make sure that everything washed with it, be it drinking glasses or windows, is wiped dry.

After washing your windows, squeeze excess water from the window surface using a squeegee. Always use new squeegee blades when cleaning your windows. Rubber tends to become rigid as it ages, and using old squeegee blades can scratch the glass. After squeezing out excess water, wipe the glass using a microfiber cloth. Never use old newspapers or rags on glass as they can also leave scratches, as well as stains, on the glass.

How to Remove Water Spots

What if your windows already have hard water stains? Should you have your window replacement service contractor replace the glass? Fortunately, you don’t have to. Hard water stains are difficult to remove; difficult not impossible.

To remove hard water stains, mix equal parts clean water and white vinegar. If all your windows are affected, you’ll need about one bucket of this mixture. Prepare one clean towel for soaking and several microfiber cloths for wiping the windows dry. Dip the towel into the water-vinegar mixture, then press it onto the hard water stains for a minute or two, then rub it gently. Repeat these steps until the hard water stains are gone, then wipe dry using the microfiber cloth.

Titanium Dioxide Coatings

Renewal by Andersen offers another preventive solution: among the many features of our High-Performance™ Low-E4® glass is the titanium dioxide coatings on the outer surface. UV rays from sunlight trigger a photo-catalytic action with the coating, which helps loosen all particles on the glass surface, including up to 99% of hard water stains.

Renewal by Andersen® of Memphis is your leading provider of house window replacement services. Give us a call at (901) 979-4460. You can also fill out our contact form to schedule an appointment.



"Absolutely wonderful experience working with renewal. They kept my wife and I up to date all throughout the process from the initial sales pitch to installation. They were courteous and professional throughout. The installation of 8 windows was completed in one day and the product is fantastic. Immediate difference felt inside the home and its much quieter now too. My wife and I are thrilled at our purchase. The windows are a bit pricey but worth every single penny. Wonderful product from a wonderful company. Will definitely be using them in the future to install the rest of the windows in our home."

Joseph Sipes
Jul 16, 2022

"When I say, superior service I mean just that!! From start to finish I was pleased!! Step 1, Scheduled appointment at the Home show… easy. Step 2, phone call to confirm appointment the next week….easy. Step 3, in home consultation with Keith Billingsley…..Amazing!!!! Step 4, call and cancel all other Window companies and let them know you have chosen the Best company, Anderson Windows!!! My Windows took a couple of months to come which was not a problem. Oooohhh but when installing day came ( a week early) I was lost for words. The installation team was A1 with professionalism and cleanliness!! They didn’t leave a scrap of trash on my property. It was cleaned up both days. I had Ed Tutton and crew. I had a million questions and they answered every one of them and made me feel so assured with the process. A couple of my Windows had wood rotted. They took care of it and fixed it better than when the house was built!!! Two of my Windows came in broken, it was addressed and shown to us and reorder in the same day!! They will be installed later. The Windows are so beautiful I stood in my master bedroom Windows for almost 3 hours just looking out. I hate Window grates…. I have solid glass Windows now❤️❤️! I wish I would have ordered my new front doors from Anderson Windows. So if you are looking to get new Windows you must go with Anderson Windows!!!"

Celeste Ousley
Jul 13, 2022

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