The wet test
Wet the pane. Mineral spotting largely disappears while wet. Etching stays visible on soaking glass.

St. George has some of the hardest culinary water in Utah, and sprinklers put it on your glass every morning. We treat the mineral spotting that is left behind — and tell you first whether treatment will get your windows back.
When sprinkler overspray or hard tap water dries on a pane, the water evaporates and the calcium and magnesium stay behind. That layer is bonded to the glass, which is why washing does not shift it and why treatment is its own job.
We see it worst on south- and west-facing elevations, on ground-floor glass near irrigated beds, and on any home where the heads have drifted slightly over the years. It shows as droplet rings and spray arcs rather than an even film.
We look at the glass and tell you whether it is deposits or etching before anything is quoted.
Specific products and dwell time, not a stronger wipe. Quoted as its own line so you see what you are paying for.
Deposits left through years of wetting and baking can eat into the glass surface itself. That is etching, and cleaning cannot undo it — so we check before you spend anything.
Wet the pane. Mineral spotting largely disappears while wet. Etching stays visible on soaking glass.
Deposits have a faint raised texture. Etched glass feels perfectly smooth, because the damage is the surface.
Where glass is partly etched we still clear everything sitting over it, which on many windows makes a real visible difference.
We look at the affected glass and identify what we are dealing with. You do not need to be home for the exterior.
Treatment is quoted as its own line alongside the clean, with any etched panes identified up front.
The deposits are treated and removed, then the whole window — glass, frames, tracks and screens — is finished properly.
We will point out the sprinkler heads causing it, and where it helps we can treat the glass to slow the haze returning.
In most cases, yes. Fresh and moderate mineral spotting from sprinkler overspray and hard culinary water responds well to treatment. Deposits that have sat for years can etch the glass surface itself, and etched glass will not come all the way back — we tell you which you have before any work starts.
A wash removes dust, grime and fingerprints. Mineral deposits are bonded to the glass and need specific products and dwell time, so treatment is its own work and its own line on the quote rather than something folded into a standard clean.
It depends on how much glass is affected, how established the deposits are and how reachable the windows are. We look at the glass and give you a real number, and the assessment is free.
Yes, before you spend anything. If the glass has etched we would rather say so than take payment for a treatment that cannot deliver. That conversation happens at the quote, not afterwards.
Deal with the source. Sprinkler overspray is the usual cause in this valley, so adjusting the heads does more than any product. After a deep clean we will often recommend treating the glass on south- and west-facing elevations, which buys months before the haze starts creeping back.
Yes. Storefront glass takes the same irrigation overspray as a home, and mineral spotting on a large frontage is common. It is quoted the same way — assessed first, then treated where it will help.
Usually within eight to twelve weeks on most homes here, because the culinary water is mineral-heavy and sprinklers run through a long summer. That is why a recurring rhythm costs less over a year than repeated restoration work.
Three tests that tell you which you are looking at, in about two minutes.
Read the guideWhat works on fresh spotting, and what will scratch your glass.
Read the guideFinding the sprinkler head that is causing it, in ten minutes.
Read the guideTell us a little about your project and we'll send a fast, no-pressure quote.
435-233-2398