I guess you mean that you are having to re-schedule your way of working. Personally I don't think that you have made it clear what you are doing and perhaps too much information on one document. Some people may take offence to being "put out" due to new customers. Personally I would sort out your new area schedules and then let the ones that are going to be later than normal know, with words to the effect of " we are currently revising our window cleaning rounds, in order to be able to maintain the cost effectiveness of our working and keep our prices affordable. We will be later to you this month, than we have been previously, but then shall carry on in future months with our normal schedules. For those of you who are not in when we clean, we will now leave a pre-printed envlelope for your cheque payment to be sent within 7 days of clean.Many thanks for your patience and co-operation in this matter.