That's referred to as "bleeding" and "crying". Try using different soap, different amounts of soap until you find something you like. Glass gleam is supposedly good in stopping that problem, although I don't feel it cleans well, exp. restruant windows.

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Micah Kommers
We Wash Windows
Greenville, SC
micah@we-wash-windows.com
www.we-wash-windows.com
AUWC Member