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Pure water (osmosis water, demineralized water, process water, etc.) consists only of water particles or H2O molecules and has no other significant components.
Our tap water, on the other hand, is enriched with many minerals and other components. Water that really only consists of water particles has two decisive advantages for cleaning work.
Firstly, pure water that has been "freed of minerals" is active for cleaning, as it wants the minerals previously removed (by osmosis or mixed bed resins) back. Searching for these minerals, the water sets loose matter or dirt in motion and "sponges it up". The treated pure water does this much better than the city water that comes out of the tap. We therefore achieve a very similar effect to that achieved by adding chemicals, soap or surfactants to the water without using these products.
The second and more important point is that pure water evaporates almost 100%. We take advantage of this when working with telescopic poles up to 25 meters long with washing brushes. After all, precise "stripping" at heights above 3-4 meters is no longer possible with poles anyway. So once the dirt has been loosened and rinsed away in the first step by the action of the water and the mechanics of the brush or bristles, the pane (solar system, façade) can simply "stay wet". The residual water then evaporates completely. Depending on the outside temperature and the prevailing humidity, this process can take from a few minutes to several hours.
