1. When you take them on tell them your business terms which should be that you call and clean regularly.
2. Call and clean regularly.
3. If they ask/tell you "to leave it"
* remind them of 1.
4. a) If they respect your original agreement then stick with 2.
b) If they don't then drop.
5. Carry on with your regular and mutually respectful customers.
*Exceptions for Gold, only applies to long term good custy who has never before messed be about:-
"Hubby just died, me 'eads wrecked." (Or I turn up at the same time as the funeral cortege - see post 8078

)
"I'm so sorry (pointing at scaffolding), I forgot to tell you we're having a new roof, windows, extension ... " (This excuse gets the lecture of: "I need to run a regular business and I have calls asking me to clean all the time, it would have been nice if I had known and I could have fitted one of them in..."
Do not let them off for:
Holidays, weather, lazy son in bed at 11 am, dog goes mad, I'm going out and I won't unlock the gate as I don't want it left open, plumber, carpet fitter or gardeners here, got flu etc etc.
Train 'em; do a top class job and let another windie have the cack.