Just had the worst first clean ever. The customer sacked the old window cleaner last week after he cleaned the windows LAST WEEK I cleaned today and couldn't believe my eyes..... The frames were green the muck coming out of the frames you could have put on the garden The vents you couldn't see. Bearing in mind these were cleaned last week. I asked the customer was he using a pole system? Yes was the answer. He had been cleaning her windows for 11 years ( not any more I may add ) 1hour 20minutes later = new happy customer I can't believe there are cowboy window cleaners It isn't rocket science....!