When I am asked for a quote, I always ask if they would like just a one off clean, or a regular clean.If they ask for a one off, I charge a lot more, if they want regular, then the extra time taken for first clean is not a problem as the effort pays off with future cleans.
Have started to charge double on first cleans ..... if they are minging.Time = Money.Had 1 on Friday on very last job and neighbour pops her head out and says how much do you charge so told her price but said as yours not been done for ages I need to charge double on the first clean ... no problem she understood and agreed.If she cancels at least I have covered my time.