Had a bloke on Monday ask me to clean his he said thy hadn't been cleaned in 5 year so I took my time got sorted told him there maybe one or 2 marks coz thy were pitted but would be spot on after second clean. Went back cpl days later for payment and his wife told me thy didn't want thm cleaning again as I hadn't cleaned frames. I pointed out how dirty thy had been and she said there were still marks. The marks tht were still on we're stains over havin bird **** etc on for years I came very close to losing my temper