Two different things dirty Caldwell windows in summer and they call for opposite responses. Dust off dry ground looks dramatic, rinses away, and costs nothing to ignore for a few weeks. Irrigation mineral looks milder, does not rinse away, and compounds every season it is left alone.
Wet the glass. If it clears, it is surface dust and it is cosmetic. If a white haze remains after cleaning, that is mineral deposit and it is the beginning of etching. Only the second one gets worse by waiting, and that distinction should drive whether you book now or in October.
The water running through the county's irrigation network is untreated and mineral-heavy. On larger Caldwell lots with more zones and longer run times, a single misaimed head delivers a great deal of total contact across a summer, and south and west elevations show it first.
Caldwell runs hot in July and August. Glass in direct sun flash-dries faster than it can be worked, which produces the exact spotting the clean was meant to remove. Work gets scheduled early or onto shaded elevations for that reason.
Panel output falls as dust accumulates, and in a dry Caldwell summer it accumulates quickly. Panels are cleaned with the same pure water method, which matters because soap film would give the next dust load something to bond to.
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Dust rinses off when wet. A white haze that stays after cleaning is mineral deposit, and it worsens each season.
It takes the most afternoon sun, so water evaporates fastest and leaves the most mineral behind.
If it is dust, waiting for fall is better value. If it is mineral deposit, earlier genuinely matters because it compounds.
Yes, using the same pure water method, which avoids leaving residue for dust to stick to.
Pressure washing is $0.20 per square foot and house washing is $0.18 per square foot soft-wash.
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