So true! Its swings and roundabouts isnt it
In our game. I have a customer that once everyones windows in the courtyard are cleaned. She invites me in for a coffee, sandwhich and a slice of cake and always pays extra. Shes an old dear and has done this since day 1. Another one gives me coffee n toast in a morning. They (hus+wide) make sure I do their windows first on street before they leave for day and Im happy to oblige.
I have one or two of these customers in each of my rounds, its great.