The middle section is too long winded, and 'don't bin me' is not a clear statement, we know straight away what it means but imagine an OAP glancing at the leaflet.
I think it's using an idea that is not needed, do you really think people will bin it, try other cleaners, then wish they had kept it ( I know you don't and it's reverse physiology )
using the points you make on the bottom of the leaflet I think it would make a fantastic leaflet based on the old and well used '5 reason ' technique e.g.:
5 secrets other window cleaners don't want you to know
5reason our customers recommend us to their closest friends
5 reason your neighbours don't want you to read this leaflet
5 reason your home will fall in love with us.
This is my honest opinion, but I often find when people show examples like this they don't want honesty but praise for their great idea, so to cover all bases...... BRILLIANT!! it's great, use it & become rich
