In St. George, hard water leaves chalky spots on glass fast, and once they set they get stubborn. The good news is that fresh deposits come off with the right approach, and even set-in ones can often be saved if you catch them in time. Here is how to remove them, what to avoid, and when it is a job for a window washing pro. For why our water spots glass so quickly in the first place, see why your windows spot in St. George.

13 to 24 gpg
St. George water hardness, deep in the very-hard range
10+ gpg
the threshold for very hard water, which St. George runs well above
Calcium + magnesium
the minerals left behind that you are dissolving off the glass

Can you remove hard-water stains yourself?

For fresh and moderate spots, yes. The deposits are mostly calcium and magnesium, which dissolve in a mild acid. The trick is to give the acid time to work instead of scrubbing dry glass, which just puts scratches on top of the haze.

The stain-removal method

  • Mix equal parts white vinegar and warm water. A lemon-juice solution works too.
  • Soak a cloth and lay it flat on the glass so the solution stays wet on the spots for 10 to 15 minutes.
  • Gently rub with the cloth or a non-scratch pad. Reapply and wait longer if it needs it.
  • Rinse with clean water, then squeegee or dry with microfiber so no new minerals dry on.
  • For a spot-free finish, do a final rinse with distilled water.
Field tip: test any acid or polish on a small corner first, since some window tints and coatings react badly

What should you not do?

Skip steel wool, razor blades on dry glass, and abrasive powders, all of which scratch. Go easy on strong acids, and check any commercial product on a small corner first, because some window tints and coatings react badly. Scratches cannot be cleaned out later, so it is worth being careful up front.

When are hard-water stains permanent?

If the minerals have been left long enough to etch the glass, they have changed the surface itself, and no cleaner brings it back. At that point it takes professional glass polishing or, in bad cases, replacement. This is exactly why dealing with spots while they are fresh saves you both money and glass.

When to call a pro

If you have a lot of glass, spots that will not budge, or you are worried about etching, a pro is the safer bet. With Tdooz window washing, a local pro handles inside, outside, and screens and finishes with a purified-water rinse that leaves the glass streak-free. Every pro is background checked, insured, and interviewed. Pricing is based on your home square footage and what you want cleaned, shown as an exact, upfront price in the app.