What window cleaners charge for spots

Company Published price 20 windows
My Window Washing (Chicago area, IL) Hard water removal (chemical wash), $10 per window $200
Clear View Maine (Yarmouth, ME) Hard water / stain removal, +$12 per window $240
East Coast Window Cleaning (Delaware) Hard water or mineral removal, add $10–$30 per window $200–$600
Rinse Pros AZ (East Valley, AZ) Window cleaning from $189, hard water spot removal included from $189 for the job

The Delaware company’s guide says etched glass, heavy mineral deposits or years of salt buildup are restoration work, which is why its range runs to $30. In hard-water country, ask whether spots are already included: the Arizona company includes them in its starting price.

Spots, or something a cleaner can’t fix?

Spots after a house wash can be rinse water or wash mix that dried on the glass. One glass maker says never to let water or cleaning solution residue dry on the glass. Another lists a mild soap or a slightly acidic cleaning solution as fine for most of its glass. Your water sets how much is left behind: the Las Vegas water district lists its hardness at 280 parts per million, and the USGS calls anything over 180 mg/L very hard.

Two cases cost more than the add-on. Hard-water spray from sprinklers can leave tightly bonded deposits, and that second maker says replacing the glass may be the only practical remedy. Rain running off unsealed concrete or mortar can etch glass in a matter of days, a third maker says. Spray hitting the walls as well? See sprinkler rust stains on house walls. If you think the washer caused the marks, read wash damage or damage already there first, and ask before booking whether the windows get a final rinse or squeegee and whether that’s in the house washing price. How we check prices: methodology.

Sources

Based on 11 sources · How we price

Checked 2026-11-09.