Method
Pure-water cleaning
Cleaning method using deionized or reverse-osmosis water through brush poles — no soap, no squeegee, leaves no residue.
A method of window cleaning that uses water stripped of minerals (see TDS) applied through a soft-brush head on an extendable carbon-fiber pole. Because the water has no dissolved solids, it evaporates off the glass without leaving spots — no soap, no squeegee needed.
Main advantage: safely reaches second- and third-story windows from the ground, no ladders. Main trade-off: slower per-window than traditional squeegee method, and requires a mobile filtration system on the truck.