My concerns are with new customers for at least the first three months

hemski, that's exactly how i feel, first few goes i've always got an eye on custy, pull em up politely if they forget.
new one recently didn't post cheque, so left windows next time and payment reminder,
which basically says no clean this time as you haven't paid last one (custy out)
next clean they were out but got cheque in 3 days.
so as you say if they start off bad and don't learn i do tend to leave.
wether this is petty on my part i'm not quite sure.
some seem to think this is bad business.
Not saying who's right or wrong here, it's intresting to see how others do things.
good tip about capex.
was wondering how you chase up window cleaning debt, thought it would be hard to prove have.
i cleaned your windows.
no you never.
but i'm sure that can be said about most things