I have to say, Madasahat, I think that 'window cleaner' guy is unusually persuasive. I fell for his patter a few years ago, only for about five minutes, but it was long enough for me to hand him some cash, shut the door, think 'oh bloody hell' and go to google his mobile number. I'm normally quite suspicious but there was something about his innocent expression and intimate knowledge of my neighbours' names and windows that convinced me.