In the process of increasing the majority of my prices. Following conversation goes a bit like this.
Me: As from next clean (currently 2 monthly) the price will be increasing from £25 to £28.
Custy: ok no problem (he pops indoors to tell the mrs).
Custy: how much would it cost to go monthly now then.
Me: it would be £22 monthly.
Custy: ok, we'll go monthly and see you next month.
They were paying £150 per year for cleaning and are now paying £264. Can't figure people out?

??