We use only purified water for our water-fed pole system which is attached to a water pump inside our vans and can easily stretch up to 70 meters in length.
Pure water is pumped to the brush head and sprayed onto the windowpane causing dirt to be washed away. This system also removes cobwebs, bird mess, and other debris.
The purified water absorbs all the remaining residue and after one last highly pressurised blast of water, the water will then be left to evaporate on its own creating a streak-free, long-lasting protective layer against dust and dirt for several weeks.