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What Is Pure Water Window Cleaning, and Why Does It Not Need Soap?

October 2026

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The Direct Answer

Pure water window cleaning uses water that has had its dissolved minerals and impurities removed by a resin filter, run through a brush on a pole, and left to air dry. It needs no soap because the dirt lifts off in the water itself, and it needs no squeegee or hand drying because there is nothing left dissolved in the water to dry into a mark. The glass, frames and sills all get cleaned the same way, in the same pass.

Why no detergent is needed

Ordinary tap water in Essex carries dissolved minerals that leave a residue as it dries, which is why a soapy clean still needs a squeegee to physically scrape the water off before it dries into streaks. Pure water has nothing dissolved in it, so dirt lifts into the water and the water itself leaves nothing behind when it evaporates.

What the actual process looks like

  • Water run through a resin filter in the van or on the pole system until it reads close to zero parts per million.
  • A soft brush on an extendable pole agitates the glass, frame and sill together.
  • The water is left to run off and air dry rather than being squeegeed or wiped.

Why frames and sills get the same treatment

A squeegee-and-cloth clean usually only touches the glass. Pure water on a brush naturally covers the frame and sill in the same stroke, which is why they come up white rather than just the pane in the middle.

FAQ: Does it work on dirty glass as well as regular maintenance?

Yes, though a first clean on genuinely neglected glass sometimes needs an extra pass to lift years of built-up grime before the pure water finish shows through properly.

FAQ: Is it safe for all frame types?

Yes. Pure water at the pressure a brush applies is gentle on uPVC, timber and painted frames alike.

FAQ: What does window cleaning cost in Rayleigh?

From £18 a clean on a four-weekly cycle. Full detail is on the window cleaning page.

07467 214446 or WhatsApp for a price.

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Send your postcode and what you want doing. We come back the same day with a real number — £18 a clean for a standard house in Rayleigh.