How Pure Water Window Cleaning Works

A practical explanation of the system we use on Maidstone window-cleaning rounds — what the water does, what the brush does, and why the windows are left wet.

What “pure water” means

Normal tap water contains dissolved minerals. If ordinary water is left to evaporate on glass, those minerals can remain behind. A pure-water system filters and deionises the water before use so the final rinse contains extremely low levels of dissolved solids.

The brush does the cleaning

The water-fed brush does the physical cleaning, agitating the glass, edges, frames and accessible sills before the loosened dirt is flushed away with purified water.

Illustration of a water-fed window brush and purified rinse water

Why the windows are left wet

With this method the final rinse is normally left to dry naturally. That can look unusual if you are used to a squeegee, but it is deliberate: the aim is to leave only purified rinse water on the surface rather than detergent or mineral-rich tap water.

What 0 ppm means

We use a TDS meter to check the dissolved-solids level of the purified water. A 000 ppm reading is the target for the rinse water, with the filtration equipment checked and maintained as part of the process.

Ground-based reach

Carbon-fibre water-fed poles allow many first-, second- and higher-storey windows to be reached from the ground. That reduces the amount of ladder work around the property, although every building still needs to be assessed for safe access and obstructions.

When another method may be needed

Some marks such as paint, cement, adhesive, silicone, mineral deposits, oxidation and scratches may need specialist treatment or may sit outside a standard maintenance clean. Clear photos help us identify these before quoting.

Why this matters for Maidstone customers

The method lets us clean the whole exterior window area consistently on a regular route while carrying our own purified water. Customers do not normally need to provide an outside tap or electricity.

Want a straightforward Maidstone quote?

Send your postcode and a few property photos if you have them. We can usually assess the job without making you wait in for an initial visit.

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