How many times have i heard that the potential customer has been trying for three years to get a cleaner and just got one last week! Or "we don't have a cleaner round here"- you get there and canvass all the other houses and they all say "we've got a regular cleaner thank you".
Maybe, in general the said customers don't see the cleaner come in their road still, but we're dropped for being a pain in the arse.