wayno has hit the nail on the head.who are they to question you about how much they think u earn?they dont know what it takes to run a window cleaning business!accountants,tax,insurance,no holiday/sick pay/bad weather days.then theres ur underpriced bread and butter work that doesnt earn u as much.not forgetting having to write off money owed to us sometimes then theres the collecting/administration/equipment to upgrade etc.its not like working for someone else and getting a monthly wage paid in the bank and thats it!!! ::)THIS USUALLY SHUTS THEM UP!!!

or loses you a well paid account
just be nice with them, that kind of explanation is ok, but in the right way , if you speak down to them you will make an enemy not a happy custy