If you clean your windows once a year in the Treasure Valley, do it in October, after pollen, irrigation overspray and wildfire smoke are finished for the season. Twice a year, go late April and mid-October. Winter exteriors are fine on dry days above freezing, and interiors are best done then.
Spring is the popular booking window because winter grime is easy to see, and there is nothing wrong with an April clean. The problem is what comes right after it. Glass cleaned in April gets hit with cottonwood and grass pollen, spring wind carrying field dust, and sprinkler startup throwing mineral spray on the lower panes, usually within three weeks. Glass cleaned in the first three weeks of October has nothing left coming at it. Pollen is done, irrigation is shutting down, smoke has cleared out of the valley, and the next real dirt source is four or five months away. It also lands right before the stretch of the year when you are inside looking out the most. One annual clean in October outlasts one annual clean in April by a wide margin here. Two cleans a year, late April and mid-October, is the pairing that holds up.
March through May: juniper, cottonwood and grass pollen, plus wind pushing farm and construction dust onto every west-facing elevation. Sprinklers come back on and start spotting the bottom two feet of glass with hard water. June: the calmest stretch of the year for glass, and a good month to start if you are new to a schedule. July through September: irrigation running daily, dust off dry fields, and smoke. October: the payoff month, when everything above has stopped. November: leaf drop packs the gutters, and gutter overflow streaks the windows directly underneath, which is why the two jobs belong in the same week. December through February: inversion parks fine particulate near the valley floor, so exterior glass hazes slowly while interiors pick up furnace dust and cooking film.
Smoke season in the valley usually runs from early July into September. Some years it barely shows up; other years it sits over the foothills for weeks. Smoke leaves a fine ash and soot film that dulls glass without making obvious spots. You notice it as flat gray light rather than dirt, which is why people often blame their windows for looking tired in August without knowing why. That film comes off easily, and it comes right back if air quality drops again the following week. So we tell people not to book a full-house exterior clean in the middle of a bad smoke stretch. Wait for the air to clear, then clean, and you get a result that lasts. The exception is a deadline. If you have a listing photo shoot, a wedding, or a move-in date during a smoky week, clean for the deadline and go in knowing a touch-up may be needed.
Fall, yes, and it is the best value on the calendar. Winter, with limits worth stating plainly. Pure water freezes on cold glass, and ice on walkways makes ladder work unsafe, so exterior work is not practical below freezing. We watch the forecast and move the appointment when a morning comes in cold rather than doing a rushed job. On a dry winter day in the 40s, exteriors go fine. Interiors have no weather limit at all, and winter is when they matter most. The low sun angle at this latitude drives light straight through south and west windows and shows every film and smear you ignored in July, and the furnace is recirculating dust the whole time. A large share of our January and February work is interior-only, which is quicker and costs less than a full interior-and-exterior visit.
Three things set your frequency, and you can check all of them yourself. Exposure: count the trees within thirty feet of the house and note whether your main windows face a busy road or open field. Those homes need two or three cleanings a year; sheltered homes need one. Sprinkler contact: if a head is hitting the glass, you have hard water minerals building on the surface, and left long enough that becomes a restoration job instead of a cleaning job. Fix the head first, then clean. Use: a back bedroom nobody looks out of does not need quarterly service, no matter what a plan says. When you compare companies on seasonal work, ask three questions. Are screens included or added? What is the temperature cutoff for winter exterior work? Can a recurring plan be paused or cancelled without a fee? Vague answers to those are the warning sign, not the price.
Reflekt runs Monthly and Quarterly memberships with no contract, and the schedule is most of the value: the plan puts you on the calendar in the shoulder months instead of the April rush. Members get a free annual screen cleaning, and every visit carries a 7-Day Rain Guarantee. We clean with 100% pure deionized water and no soap, so there is no residue left to grab dust. Window cleaning starts at $199 by pane count, screen cleaning adds $50, gutters start at $199. Where we are behind: Reflekt was founded in April 2025 by Hunter Stevens and Ethan Seusy, so we have fewer years and fewer total reviews than companies that have worked this valley for a decade. We are at 4.9 stars across 115+ Google reviews. If a long track record on complex commercial buildings is your deciding factor, hire the older company. Same-day and next-day slots do open up: (208) 453-6760.
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Still wondering about something? Call or text us at (208) 453-6760.
Mid-October is the strongest single date. Pollen is finished, sprinklers are shutting off, and smoke has usually cleared, so the clean holds through the winter. If you clean twice a year, add late April or early May, after the cottonwood has dropped. Homes on a busy road, near open fields, or under heavy trees do better on a quarterly rhythm than one annual visit.
Fall is the best value window of the year here. The things that reload dirt onto glass, meaning pollen, irrigation overspray, field dust and wildfire smoke, are all finished or finishing, so an October clean stays clean far longer than an April one. Fall is also when gutters need clearing, and doing both in the same week keeps overflow from streaking the glass you just paid to clean.
Exteriors, yes, on dry days above freezing. Pure water freezes on cold glass and ice makes ladder work unsafe, so we watch the forecast and reschedule when the morning comes in cold. Interiors have no weather limit and winter is when they matter most, because the low sun angle through south-facing windows shows every smear and the furnace is pushing dust around all day.
For a full-house exterior clean, yes. Smoke leaves a soot haze that will simply return if air quality drops again a week later, so you would be paying twice for one result. Waiting until the air clears, usually mid to late September, gets you a clean that lasts. The exception is a hard deadline like a listing photo shoot or an event: clean for the date and accept a possible touch-up.
Most valley homes land on twice a year. Go quarterly if you have trees close to the house, a sprinkler head hitting the glass, a busy road out front, or dogs putting noses on the sliders. Once a year is enough for a sheltered home with newer windows and no irrigation contact. Reflekt's Monthly and Quarterly memberships have no contract, so changing the rhythm is easy if you guess wrong.
Clean rain on clean glass usually dries without spots, because pure water leaves no soap residue for rain to pick up. When it does spot, wind-driven rain carrying dust is normally the cause. The 7-Day Rain Guarantee covers a return visit within a week of service at no extra charge. Call (208) 453-6760 and we will get it back on the schedule.
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