I had one last week, bit of a pain this customer. Big house, plenty of money but tight beyond belief!!
Turns up and it was raining "slightly", she says- "how are you going to clean them in the rain?" (Bear in mind she's had the full explanation procedure AND I had gone out of my way to get there for her). "EXACTLY the same as when it 's not raining!!" Said I with a certain look on my face, to which she got the message!!