How to keep your windows clean longer after a professional wash?

Clean windows stay clean longer if you take a few simple measures.

Tip 1: apply a glass coating after cleaning. Silicone or nano-coating products make glass water-repellent.

Tip 2: remove insect impacts immediately. Acidic residues can etch the glass coating if left too long.

Tip 3: watch your planting. Trees and shrubs too close to the facade cause pollen and tannin deposits.

Tip 4: ventilate your home well. Condensation on the inner pane leaves limescale marks.

Tip 5: plan a half-yearly maintenance clean. Two purified water cleans per year keep windows in optimal condition.