We got a call from a client asking about driveway cleaning. I told her I had a job ten minutes away from her on the next day and if she didn't mind me coming later in the afternoon, I would be able to knock it out for her. We sprayed an algaecide on the concrete and let it dwell for about 10 minutes, then went over it with a surface cleaner. She was ecstatic and fascinated that I knocked it out in a little over an hour. She said it would have taken her a week to do it by herself. I said, " Enjoy your newfound free time."