Lexington Hills went in during Eagle's mid-2000s build wave, which means the sprinkler systems out here are roughly twenty years old and running untreated pressurized irrigation water. Twenty years is long enough for nozzles to wear, arcs to drift, and one elevation of a house to end up permanently in the spray.
Hard water staining on glass is not a dirt problem, it's a plumbing problem. Nearly every Eagle subdivision, Lexington Hills included, is served by an untreated pressurized irrigation district pulling off the canal system rather than treated culinary water. That water carries dissolved calcium and suspended silt. Spray it on glass, let the Idaho sun bake it dry, and the mineral stays behind. What makes this vary so much from one subdivision to the next is age. Lexington Hills lots were landscaped in the mid-2000s, so most of the heads out here are around twenty years old. Nozzles wear, wiper seals leak, risers get clipped by mowers, and an arc set correctly at install has crept a few degrees since. A newer subdivision a mile away with heads set five years ago can be nearly clean while a street here has etching on every third house.
There are two completely different stain patterns in this neighborhood and they need different answers. Your own lot system produces bottom-of-pane staining: the lowest three or four feet of first-floor glass, the bottom rails, and the stucco or stone skirt underneath. That's lawn-zone rotor and spray throw, and it's what most Lexington Hills houses have. The other pattern comes from HOA common landscaping — entry monuments, the strips along the collector streets, the greenbelt and pond edges. Those run larger rotors off a single controller sized for coverage, not for keeping water off buildings, and they can carry fine mist up onto second-floor glass on whichever elevation faces the strip. If you have white haze upstairs on one side of the house only, that's almost always the source, not anything your own system is doing.
Before you pay anybody, do this yourself. Hose the pane down and look at it while it's still soaked. If the white disappears under the water and returns as it dries, the mineral is sitting on top of the glass and it will come off. If the cloudiness is still visible while the pane is wet, it has etched into the glass surface itself, and no chemical or amount of scrubbing brings that fully back. Second test is your fingernail: drag it across the spotting. Smooth means deposit. If you can feel ridges, it's advanced. We'll tell you which one you have before we quote it, and when a window is etched past saving we say so instead of charging you for a treatment that gets it eighty percent there.
Removal is a separate job from window cleaning, and it's worth understanding why. The 100% pure deionized water we use on every regular window clean leaves nothing behind, but it will not dissolve mineral that has already bonded. Hard water removal means working the glass by hand with an acidic mineral dissolver or a fine polishing compound, pane by pane, then rinsing and finishing with DI water so nothing is left for the next sprinkler cycle to grab onto. It's slow, it's done by hand, and severity drives the price rather than pane count. Once glass is clear, what keeps it clear is fixing the cause: turn the offending head down, swap in a lower-arc nozzle, or pull the riser back from the foundation. We'll point out which head is doing it while we're on site.
Eagle's pressurized irrigation runs roughly mid-April through mid-October, and that schedule should drive when you have this done. Getting stains removed in June just means the same heads spend four more months rebuilding them. On a heavily hit elevation the better play is to correct the sprinkler aim first, then have the glass restored in fall once the district shuts water off, so it goes into winter clear. If the staining is mild and you want it gone before company comes, we'll do it any time — you should just know it returns if the head that caused it is still pointed at the house. Hard water removal is quoted by severity and is included on the Monthly membership. Monthly and Quarterly plans are month-to-month, no contract. Locally owned, fully insured, 4.9 stars across 115+ Google reviews.
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Because a sprinkler head is aimed at that elevation and the others aren't. Hard water staining follows spray, not weather. If the haze is on lower panes only, it's your own lawn zone. If it's upstairs on the side facing a common strip, greenbelt, or entry monument, it's an HOA rotor throwing mist past the property line. Walk out during a cycle and you'll see it happening.
No, and anyone telling you otherwise is overselling. Deionized water dries spot-free, so it stops new mineral from being left behind, but it has no ability to dissolve deposits already bonded to the glass. Existing stains need a mineral dissolver or a polishing compound worked in by hand. That's a separate service, quoted separately, and priced by how bad the glass actually is.
Not reliably. We can give a range, but severity has to be seen. Try the wet test first: hose a pane down and look at it soaked. Cloudiness that vanishes when wet will come off. Cloudiness still visible under water has etched into the glass, and that's a restoration job with real limits we'd rather explain standing in front of the window than promise over the phone.
Document it and take it to the board or the landscape contractor. The fix is a nozzle swap or an arc adjustment on their controller, which costs them almost nothing. Photos of the mist hitting your siding mid-cycle carry a lot more weight than a description does. We can restore the glass either way, but if that head keeps running unchanged you'll be paying for it again.
It depends entirely on whether the head that caused it got fixed. Correct the aim and clear glass holds for years with normal maintenance cleaning. Leave it alone and heavy overspray can put visible spotting back on inside a single irrigation season, mid-April to mid-October. That's the reason we point out the source head instead of just cleaning the glass and driving off.
Yes, and people usually notice the glass first. The same mineral builds a gray-white crust on the bottom window rails, on the stucco or stone skirt near the foundation, and on lower siding. We treat those surfaces differently than glass, using softer methods, because stucco and painted trim won't take the same acid or abrasive that glass will. Tell us what you're seeing and we'll quote both.
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