Hi, I've just started looking at making window cleaning my full time job and also wasn't keen on door knocking.
I lost count of how many flyers i put out and not getting a good response.
I took the advice off people on this site and went out canvassing.
I was surprised the response i had. Even some of the houses i put a flyer through.
I still have a long way to go but find you get a better response knocking on doors.
If you don't get an answer just put a flyer through the letter box.
You will find if they already have a w/c then they will tell you, some will even ask for your number incase they change their minds or even ask you to give them a quote to see if they can save a few quid.
I've not come across one house yet that have been funny about you knocking. I have found that they are quite happy that you have called even if they already have a w/c.
If they do ask for a quote and already have a w/c tell them that you don't want to know what they are paying at the moment as you are not there to undercut on purpose and take work from others.
I found the other day i quoted more than the w/c they already had and they still wanted to change to me. I also got a couple which i found out after i was cheaper, but told them at the start i didn't want to know what they were already paying.
Once you have knocked on a few doors you will start to enjoy it, I have.
Try it you won't be disappointed.
Good Luck
Craig JWC