PURE WATER WINDOW CLEANING EXPLAINED :

 Window Cleaning (regular) involves only 2 steps - Agitation, and Removal.  Traditionally, we agititate with an Applicator - this ‘stirs’ (dissolves) the dirt (solids) into solution.  Then we remove the dirty water with a squeegee, working from the top edge down.  The detergent has little to do with the cleaning process (other than greasy finger prints) .. it is really in the water as a surfactant to enable the squeegee rubber to glide over the glass.  Cleaning with Pure Water is exactly the same but with different tools.  The brush bristles do the job of the applicator and ‘stir’ the dirt into solution, while the jets of the brush do the job of the squeegee, starting at the top, working the dirty water off the glass.  Done properly, all the dirty water is ‘chased’ off the glass, leaving only spot-free water to dry.  As with the squeegee, if you miss any of the dirty water, it will dry leaving the dissolved solids on the glass.
This process allows the operator to stay safe on the ground while cleaning up to 45 feet.