This 2 story window washing cart (http://www.cleanfreak.com/Qstore/p001714.htm) by Unger is the easiest system to use on the market. It can easily scrub windows in a building up to 2 stories tall. This video goes through hooking up your Unger HiFLo window washing cart. A normal person with the 17 foot extension pole can easily clean windows up to 20 feet on a standard building. The deionized water leaves your windows sparkling clean because of the clean water that is being used. A TDS meter is connected to the machine, and once that gauge reads more than 10 particles per million, the filters need to be changed to provide pure water again.
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