How it works

What is water-fed pole window cleaning (and why it leaves zero streaks)?

June 2026 · 5 min read

If you've watched a window cleaner work lately, you may have noticed something different: no ladder, a long telescopic pole reaching the second story, and — strangest of all — they never wipe the glass dry. That's water-fed pole cleaning, also called pure-water cleaning, and it's the method most professional crews (including ours) now use.

Tap water is the enemy of clean glass

Ordinary tap water is full of dissolved minerals, mostly calcium and magnesium. When that water dries on glass, the minerals stay behind as the spots and streaks you're trying to get rid of. That's the whole reason traditional cleaning needs soap and a squeegee to wipe every drop away before it dries.

Pure water does the work instead

A water-fed pole system solves the problem at the source. Tap water is pushed through a multi-stage filter — reverse osmosis followed by de-ionization — that strips out nearly every mineral until it reads close to zero on a purity meter. That ultra-pure water is "hungry": with no minerals of its own, it pulls dirt and grime off the glass like a magnet. The purified water travels up a lightweight pole to a soft brush that scrubs the glass and frames while jets rinse it all away. Because what's left has nothing in it, the window dries perfectly clear — no spots, no streaks, no towel required.

Why homeowners love it

Common questions

Why don't you dry the windows after cleaning?

Because the water is purified, there are no minerals to leave spots. It dries clear on its own.

Does it work on hard-water spots?

It prevents new spotting and rinses away fresh buildup. Heavy, baked-on mineral stains may need a separate restoration treatment first.