Pure water window cleaning explained (and why we use it)
If you've seen a window cleaner using a long pole instead of a ladder and bucket, that's reach-and-wash purified water cleaning. It's now the standard for professional work — and for good reason.
Here's how it works and why it gets glass cleaner, safer, than the traditional method.
What 'pure water' means
Ordinary tap water contains dissolved minerals and impurities. When it dries on glass, those minerals are left behind as spots and streaks — which is why a traditional clean needs a squeegee and a lot of buffing.
Purified (de-ionised) water has had those minerals filtered out. It's so 'hungry' for minerals that it actively lifts dirt from the glass, and because there's nothing dissolved in it, it dries completely clear with no residue.
How reach-and-wash works
Purified water is fed up a lightweight telescopic pole to a soft brush. The brush agitates the dirt while the water rinses it away, and the glass is then left to dry naturally — spot-free.
Frames and sills get cleaned in the same pass, which a quick squeegee clean often skips.
Why it's safer
The pole reaches upstairs and awkward windows from the ground, so there are no ladders leaning against your home or guttering. That's safer for the cleaner and avoids the damage ladders can do to frames, walls and plants.
It also means no one is climbing around above your garden or property — useful for taller homes and conservatories.
The finish you can expect
Because nothing is left on the glass to dry, the result is a clear, even finish that lasts longer between cleans. There are no smears, no detergent residue and no chemical run-off onto your plants.
It's the system we use on every job across Hamilton and the surrounding towns, on our regular four-weekly rounds.
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Book a cleanFrequently asked
Why are my windows wet after a pure-water clean?+
That's normal — purified water is left to dry on the glass rather than squeegeed off. Because the minerals have been removed, it dries clear with no spots, usually within an hour or two.
Is pure-water cleaning better than traditional?+
For most homes, yes. It cleans the frames as well as the glass, reaches upstairs windows safely from the ground, and the finish lasts longer because no residue is left behind.
Keep reading
How often should you have your windows cleaned?
Monthly, quarterly, twice a year? How often homes really need their windows cleaned — and what affects it.
How to remove hard-water spots and limescale from glass
Those cloudy white spots that won't wipe off? Here's what causes them and how to get glass properly clear again.