I think the word 'Finish' is too dark. It will disappear into the background when printed, I would make this lighter (the same as the word 'Pro'.
The caricature is ok, but I would prefer a picture of you cleaning, or perhaps you with your van. It shows the customer who actually will be cleaning for them. It's nice to see the person who will actually be doing the job.
The collection of logos I would get rid of. You are simply showing people other ways they can contact you. They have your leaflet, is that not enough?
Scan for website, get rid of it, just put the website address in! Don't try and be clever, this is window cleaning, we have enough trouble trying to get customers to leave their side gates open!!!
Health and safety is at the forefront of your mission! It's not mine. Customer satisfaction is what I aim to achieve every time.
And I love the word mission, you're either BA Airlines or Tom Cruise.
Big telephone number at the bottom, along with a website address would be great.
And perhaps "Call Tom today for a free quote (supposing Tom is your name, I did take a guess).
And what's on the other side of the leaflet...don't tell me you have left it blank when the cost of printing 2 sides is so cheap, compared to one side.