...its not worth cleaning those windows because its going to rain
This hasn't been said much to me, but on the rare occasion it has, it's by some old tightwad who'd prefer you to give them a miss and save him some dosh. It's a bit like phoning BT and saying, 'Look, I'm off on holiday for two weeks, can I be refunded my line rental for that period'?
In reply, I just tell 'em, 'That's an extra fiver for a rain water rinse', and crack on with cleaning. (I plaguarised the line from this site.)
However, the misconception I hate the most is that all window cleaners are too thick to get a 'proper job'. It's, I assume, normally assumed by the general populace. Only recently after chatting with one customer, he asked me in rather incredulous tones, 'Why are you a window cleaner?', as if it's obviously a low paid, menial, trivial occupation, and I should be able to do better.
I think he thought it was a compliment towards me, suggesting I had a brain cell or two. Obviously he was wrong on all counts! (There's joke in there somewhere, before some wit gets stuck into me).
Oh, and another customer has recently attempted to recruit me into the police force (I told him the pay wasn't good enough; and besides I
wasn't thick enough).