The key is to be patient and professional...do a really good job at every house and rest assured they will recommend you to their friends and family. I started 18 months ago. started with 2000 flyers. I only ever posted 300 of them and now ive got a full 4 week calendar month of work....ive also got rid of over 40 customers since i started underquotes, awkward,bad payers,too far away, ****holes.......if i could give you two bits of advice they would be... never underquote just to get the job...you'll regret it later on...and, do all the sills, frames and doors included in the price...charge more, takes longer but you will need fewer customers long term and a window cleaner who does sills, frames and doors is as rare as rocking horse sh** !!!
They will be very impressed.