Another pinner said...Wash outdoor windows with Woolite. I have been doing this for years and found a blog with photos. I use 1/2 cup to 1 gallon warm water, but other than that I do the same as this blogger using a soft car washing brush on an extension handle. Makes outdoor window cleaning easy.
This long-forgotten gem of a cleaning agent may be used with a little water or vinegar to lift even the most stubborn stains. Unattractive grout driving you batty? Mold and mildew stains got you reaching for the Prozac? Burner pans and casserole dishes giving you fits? Cream of Tartar is your new best friend.