I am not sure of a recipe, per se. I have used the commercial product and it was not worth a darn. It didn't remove all the dirt from our windows and left streaks of not just dirt but also of cleaner.
Nothing beats elbow grease. However, if you were going to try something, I'd make sure the plants under the window were protected with a tarp, and mix a little dish soap with some vinegar and blast away.
Posts: 176 | Location: Western PA | Registered: Jan 07, 2005