keep it simple and say "Would you like a window cleaner?" after about 50 NOs you'll get quite thick skin but keep going.And always be up front with prices and once you get a few interested you will want to keep going,but be prepared for the lows those that cancel change their minds,it takes a while and hard work to build the round up.I started with nothing didnt even have any window cleaning tools but went out and canvass 2 weeks solid,I did have previous experience and had a start of a round,brought some work as well.