Most complaints about window cleaning machines are not about the machine itself, Sudan This is the source of the problem. A significant portion of calls regarding "the machine isn't cleaning the glass properly" can be resolved with water conditioning or brush maintenance.

Water hardness and limescale

Hard water contains dissolved calcium and magnesium salts. When a water droplet evaporates from a glass surface, these salts remain on the surface — as a whitish, dull stain.

The most annoying thing about this stain is, It is not visible during washing.. Glass appears perfectly clean when wet; stains only become apparent after it dries. By that point, the glass may have already entered the insulating glass unit — and once the unit is switched off, there is no access to that surface.

Solution

The final rinse should be done with demineralized (deionized) water. Reverse osmosis or ion exchange systems produce this water. It requires an initial investment, but the return on investment is quick in insulated glass production.

Have your water hardness measured. The result will determine the capacity of your water conditioning system.

Circulating water: from cleaner to abrasive.

Washing machines recirculate water to conserve it. However, the recirculated water picks up some glass dust and dirt from each glass surface it washes.

If left unfiltered, these particles will accumulate in the water. After a while, brushes won't be able to clean them anymore., erodes - especially In Low-E coated glass This refers to scratches that are difficult to see with the naked eye but become apparent after assembly.

Solution

• Check and clean the filter system regularly.
• Periodically drain and flush the circulation tank completely.
• If the water becomes visually cloudy, it already means it's too late.

Brush care

Brushes are consumables; they wear down and their bristles shorten over time. A worn brush can't make adequate contact with the glass surface, and the cleaning quality quietly decreases.

What should we look for?

• Hair length: If it has shortened noticeably, it's time for a change.
• Uneven wear: If one side of the brush is more worn than the other, there is an alignment problem.
• Hair stiffness: Hardened or dirty bristles neither clean nor clean properly; they scratch.
• Pressure adjustment: Is the brush opening correctly adjusted to the glass thickness?

Drying: the often skipped step

The result of the washing is not clean glass, clean and dry It is glass. Moisture remaining on the surface:

• Moisture is trapped inside the insulated glass unit and leads to condensation.
• In lamination production, it creates bubbles between PVB and glass.
• It causes adhesion failure in coating lines.

The airflow and angle of the drying blades should be checked regularly.

Practical maintenance schedule

Troubleshooting shortcut

There is a white, matte spot on the glass. Water hardness. Proceed to demineralized rinse.

There are small scratches on the glass. The circulation water is dirty or the brush pressure is too high.

The glass comes out dirty in places: The brush is worn or the pressure is insufficient.

The glass comes out wet: The dryer blade has a low airflow rate or a faulty angle.

Detergent residue remains: The rinse cycle is insufficient — a machine with multiple washing cycles may be needed.

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