I am still in the position of needing every customer I can get ... within reason.
Also, where I live now there is generally a different perception towards window cleaning. By this I mean that most people don't want their windows cleaned on a regular basis, or give all manner of reasons/excuses for saying 'not today'. Therefore there is more of a market here to provide a service for people in a similar way to running a mobile shop, ie if I am around and they want their windows cleaned, I do them there and then. If that particular day is not suitable, they wait until I am around again, and I will do them if I can fit them in.
In the meantime I am still building my business by trying to attract good, regular customers in order to change the perception to encouraging regular cleans, so that I can eventually drop those who fail to fit in with my business plan.
John