you need more customers if you have time to look at dirty windows,get knocking and build up a round so you can earn some proper money.W/C that do fortnight cleans are a thing of the past,you will find a lot will ask for monthly or six weeks,if you need 50 customers a week get yourself 250+ customers,it will take you a long time if you only have 10 customers to refer you,you need to Knock doors and shove a leaflet get out there and advertise,not all customers will go on internet to find a window cleaner.