I charge 2 cleans plus expenses but only take payment after they have been cleaned. So first payment due after first clean then I take next payment in 4 weeks when been cleaned again, stops any cancellation payments or having to replace work. You only pay for what cleans.
My cancellation rate is low due to being a window cleaner so I know what I am doing.
I am putting my money where my mouth is and showing how confident I am in my service....