I'm standing here working in Radio Shack bored out of my mind with no customers, and the window washer guy just came by about 15 minutes ago. Now i'm thinking... he just cleaned 5 windows and it took no more than 3 minutes to do it all, and he charged 8 bucks. He comes by every month and does several windows in the shopping center. Now this has me thinking... If I offered this to my customers for, lets say $30 for one cleaning a month on a single-story home, and it takes about 10-15 minutes to do using a squeegie/spongue thingy, isn't that a great way to make extra cash? Have any of you guys done this? Think its worth looking into?