What hard water stains means
Hard water stains are mineral spots etched onto glass by sprinklers or runoff, which normal cleaning does not remove.
Also called mineral deposits, sprinkler spots.
Where it matters on a window cleaning job
Removing them takes special compounds and time, and badly etched glass may not come fully clean. Test a spot, price it separately and set expectations in writing.
What it costs
For hard water stains, the closest koira.ai price is the window cleaning cost guide, near $250 for a typical job and $150 to $350 for most. The guide shows its sources and what moves the price. The window cleaning cost calculator prices a job line by line.
Work it out
- Free calculator: Window cleaning cost calculator
- Cost guide: Window cleaning cost
- Tools, templates and guides: Free window cleaning resources