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Yes window cleaning is good.

back 3 years ago all I use to do is drive around and wash 4 to 6 houses day, every day rain or shine I would make really good money, however at the time I did not clean roofs, or whiten gutters, I even preferred not to clean concrete, because I had my little system down. I use to schedule a house wash every two hours in my books, this gave me time to talk to the customer, answer and return calls, and wash the house, but that also gave me time to do extras and also clean the neighbors house. I found that every two hours I was able to keep my schedule perfect. I was doing a lot of ripping and running but it was fun, I liked working hard in short periods then getting off my feet.

but now that I clean roofs, whiten gutters, clean concrete and even clean a few windows I am able to make the same if not more on one job. things change some how you just got to roll with them.