Most of Kuna runs on pressurized irrigation, not treated sprinkler water, so overspray on ground-floor glass leaves a reddish-tan silt film on top of mineral scale. It's not the same problem as Meridian's tap-water spotting, and it doesn't come off the same way.
Kuna's city water comes from eleven groundwater wells and tests around 137.7 mg/L, roughly 8 grains per gallon - hard, but not unusual for the valley. The bigger issue is that most Kuna properties water lawns and beds off pressurized irrigation pulled from area canals fed by the New York Canal network, not treated municipal water. That's raw surface water carrying suspended silt, running mid-April through mid-October. When a sprinkler head overshoots onto a first-floor window or a patio slider, it dries into a gritty, reddish-tan film layered over mineral scale. It etches into glass faster than plain hard water because the silt acts like a light abrasive every time the sun bakes another pass onto the same spot.
The newest wave - Valor, Paloma Ridge, Denali Heights - runs black vinyl window frames, and black frames show hard-water spotting worse than any other color because there's no light frame to hide the contrast against etched glass. Add oversized sliding patio doors and glassed-in covered patios low to grade, right where irrigation overspray lands. Sterling Ranch, Silver Trail, and Greyhawk have big front-facing great-room windows two stories up that mostly dodge sprinkler overspray but still take direct mineral scale from roof and gutter runoff during storms. Homes backing a canal, lateral, or field - common on the acreage belt off Swan Falls and Kuna-Mora - get it worst on whichever elevation faces the water.
Run a wet microfiber cloth over the spot. If most of it wipes off and what's left is a light haze, that's fresh silt film - a good squeegee-and-vinegar pass handles it yourself, and you don't need to pay anyone. If the cloth does nothing and you can feel raised, gritty texture with your fingernail, the silt has been baked into the glass by UV over one or more summers and turned into etched mineral deposit. That needs mechanical or mild-acid treatment to lift without damaging the glass. Fresh-build owners in Denali Heights or Paloma Ridge who just finished landscaping this year almost never need professional treatment yet - wait until you see the gritty stage.
We run 100% pure deionized water with no soap. On plain hard-water spotting that's usually enough on its own - the ion-free water won't leave new mineral residue behind, so the glass rinses spot-free. On the silt-plus-scale combination common here, we work the mineral layer loose first, then finish with the deionized rinse so nothing redeposits while it dries. That leaves the RainShield finish, which sheds water rather than letting it sit and evaporate into new spots - useful in Kuna specifically because between irrigation cycles and valley wind, glass here gets a fresh mineral load faster than in river-corridor cities like Eagle or Garden City.
Irrigation typically comes on in April and shuts off by mid-October, and glass looks worst from May through September while sprinklers run on silty canal water and UV bakes it in. A cleaning scheduled right after irrigation shuts off in fall clears the season's buildup before winter inversions add road grit on top. One in spring, before the water turns on, catches winter grime first. That's the logic behind the Monthly and Quarterly memberships - no contract either way, and Quarterly saves $100 per cleaning versus one-off visits, which matters when a property is picking up a new layer of mineral film every few months instead of once a year.
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Mostly something else. Kuna's municipal water is moderately hard, about 8 grains per gallon, but the heavier staining on ground-floor windows and sliders usually comes from pressurized irrigation - raw canal water most of the city uses to water lawns from April through October. That water carries suspended silt on top of dissolved minerals, which is why the film often looks reddish-tan instead of just cloudy white.
Yes. The deionized water process cleans the glass itself, not the frame, so frame color doesn't change the treatment. Black frames just make existing hard-water etching on the glass more visible by contrast, which is usually why owners in newer black-frame subdivisions notice the spotting sooner than neighbors with white or tan frames.
If sprinklers overspray onto your windows or patio doors regularly, plan on twice a year: once in spring before irrigation starts and once in fall after it shuts off. That's what the Monthly and Quarterly memberships are built around. If your sprinklers don't reach the glass, once a year is usually enough - the tap water alone won't build up nearly as fast as canal overspray does.
Probably not this year. Fresh construction glass with one landscaping season behind it usually shows light haze at most, which wipes off with a normal wash. Hold off on paying for stain removal specifically until you see gritty, raised texture on the glass - that's the sign mineral deposit has actually baked in rather than sitting on the surface.
Usually, yes, though severity varies and we quote it after seeing the glass in person rather than guessing over the phone. Multi-year buildup on a south- or west-facing slider that's taken direct summer sun and irrigation overspray the whole time takes longer than a single season's film, but deionized-water treatment lifts most residential cases without damaging the glass.
If it rains within 7 days of your cleaning and leaves new spotting, we come back and re-clean at no charge. It's aimed at plain rainfall residue, not a fresh irrigation cycle - if your sprinklers run again and re-spray the same window three days later, that's new overspray, not a guarantee callback, though we're glad to talk through moving your sprinkler timing off your cleaning day.
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