Pure-water window cleaning explained

In this context, pure water means water treated to reduce dissolved mineral content before cleaning and rinsing. It is commonly produced using deionisation (DI), reverse osmosis followed by DI, or obtained from a suitable supplier.

The purpose is to reduce the residue left by the rinse water as it dries. It does not mean that the water is sterile, drinking water, or able to remove every type of contamination. A TDS meter helps monitor dissolved solids; it is not a complete test of water safety or cleanliness.

1. The delivery system supplies treated water through the hose and pole.
2. The brush agitates dirt on the suitable glass and frame surfaces.
3. A thorough rinse carries loosened dirt away.
4. The cleaned surface is left to dry, then checked for remaining marks.

There is no need to describe the water as “magnetic” or “hungry”. Brush work and rinsing do the practical cleaning. Frames, seals, a contaminated brush or persistent deposits can still affect the result.

Production capacity and carrying capacity are separate decisions. Compare the RO and DI options before choosing a tank size.

A suitable water-fed pole can let you clean some exterior windows from ground level. It can also allow frames and glass to be washed in one routine. Assess each site and use the pole within its instructions; ground-level work still involves hazards.

Traditional cleaning remains useful, particularly indoors and where water runoff is unsuitable. A correctly used squeegee removes the cleaning solution rather than leaving tap water to dry. Neither method is automatically best for every job.

Specialist stains, damaged surfaces and coated glass may need different treatment. Follow the surface manufacturer’s instructions before changing brushes or adding chemicals.

• Monitor the final output and record changes in TDS.
• Keep the tank, hose and brush protected from contamination.
• Maintain pre-filters, membranes and resin as instructed.
• Inspect the dried result instead of relying on a meter alone.
• Include water use, consumables and maintenance when comparing running costs.

For a practical cleaning routine, read how to clean windows with a water-fed pole.