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Rinse water for window washing




Q. Professional window washers use deionized water for a final (spot free) rinse). Would soft water work as well?

Malcolm Field
Electroplating - Palos Verdes Estates, California, USA
2004



A-maz Glass Cleaner / Water Stain Remover

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A. A water softener works by substituting a new salt for the old salt. I don't think it would help at all. A dilute solution of isopropyl alcohol would probably work somewhat, as it does on eyeglasses, by leaving less water on the windows to dry and stain them.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2004


A. Window washers use deionized water as a rinse because it 99.9% free of any impurities which cause water spots. It is almost pure H2O. Soft water has salt in it which is an impurity. Soft water would stain your windows with salt and other impurities as it dried on the window. If you do not want the expense of deionized water, but want to rinse without water spots, another possibility is to use Reverse Osmosis water. You can get this from the local water supplier or water store and rinse away your sudsy window with it. RO water is about 94-96% free of impurities. There is a small possibility that you could have a few water droplet stains left behind.

Brad Platt
window washing - Woodruff, Arizona, USA
2004




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