Those cloudy white spots on your windows are almost always minerals from sprinkler water, not dirt. I am Jac, and I remove them with a patient, step by step process, then finish with deionized water so they do not come right back.
What Are Hard Water Spots, and Why Are They So Common in Utah County?
Utah County water carries a lot of dissolved calcium and other minerals. When sprinklers hit your windows and the water dries, the minerals stay on the glass as white, cloudy spots. Do that every summer for years and the deposits build up and bake on.
Can Hard Water Spots Actually Be Removed?
Often they can. Deposits sitting on the surface of the glass usually come off with the right treatment. Minerals left for years can etch into the glass itself, and etching is damage that cannot be polished out. I test a small area first and tell you honestly which one you have before I spend your money.
How Do I Remove Hard Water Spots from My Windows?
- Treat the minerals. I use a calcium, lime and rust remover to break down the deposits.
- Work the stubborn spots. A window blade and steel wool lift the set-in minerals, used carefully and tested on a small area first.
- Scrub. A wand and scrubber with heavy soapy water, using my own hydrophobic soap, lifts the grime.
- Rinse with deionized water. The minerals are stripped out of the water, so nothing dries on the glass and the finish is spot-free.
Why Deionized Water Makes the Difference
Plain tap water is what put the spots there in the first place. Deionized water has the minerals taken out, so as it dries it leaves nothing behind. That is how I get a spot-free finish without wiping, and it is why my windows stay cleaner longer.
How Can I Keep Hard Water Spots from Coming Back?
- Point sprinklers away from the glass, because overspray is the main cause.
- Clean before the minerals have years to set, since fresh deposits are far easier to remove.
- The hydrophobic soap I use makes water bead and roll off, which helps the glass stay clean longer.
Questions People Ask Me
What causes hard water spots on windows in Utah County?
Utah County water is full of dissolved minerals, mostly calcium. When sprinklers spray the glass and the water dries in the sun, the minerals stay behind as white or cloudy spots. Over many seasons those deposits can bake onto the glass.
Can hard water spots be removed from windows?
Often, yes. Mineral deposits that are sitting on top of the glass can usually be removed with the right treatment and some patient work. If the minerals have been there for years, they can start to etch into the glass, and etching cannot be polished away. That is why I test a small area first and tell you honestly what I find.
How do you remove hard water spots?
I treat the glass with a calcium, lime and rust remover, then use a window blade and steel wool on the stubborn, set-in minerals, followed by a heavy soapy scrub with my own hydrophobic window soap. The final rinse is deionized water, so no new minerals dry on the glass.
Why does deionized water matter for spots?
Deionized water has the minerals removed, so when it dries it leaves nothing behind. That means a spot-free finish without wiping, and it is the same reason I never rinse windows with plain tap water.
How do I stop hard water spots from coming back?
Redirect sprinklers away from the glass if you can, since overspray is the main cause. My soap is hydrophobic, so water beads and rolls off and the windows stay cleaner longer. Cleaning before the minerals set is far easier than removing them years later.
Do you wash interior windows?
Not at this time. I clean the outside of the windows, and screen cleaning is available as an add-on.
Do you serve my city?
I serve Utah County and communities within about a half hour of Salem, including Lehi, Saratoga Springs, American Fork, Eagle Mountain, Spanish Fork, Payson, and Nephi.
Exterior window washing by Jac, the Craftsman at My Hearthside, serving Utah County.