Water is passed through a special window cleaning resin. A chemical process takes place, which 'exchanges' the dissolved minerals with hydrogen ions and hydroxide ions. These new ions then combine to form water. Since most dissolved solids in tap water are salts (the things that cause spotting on windows), this process is very efficient and creates a high level of water purity similar to that of distilled water.
Water from the tap contains many impurities. Whether they are ground minerals picked up along the way, or additives that make it safe for drinking, none of these impurities do your windows any good. These are what cause spotting on windows after they dry and necessitate the use of squeegees. Worse, if the glass is not properly maintained through regular cleaning, these minerals will eventually permanently stain the glass. Deionization completely filters these impurities and allows the glass and window frame to dry completely spot free. And then able to clean high or dangerous windows safely from the ground through the use of poles, which deliver pure water for a perfect clean every time.
Contact Lanlang to get more information about window cleaning resin.