There are loads of tenement flats where i live in Scotland. I've been researching WFP cleaning recently with a view to canvassing myself a round. I was wondering how you deal with upstairs properties when your not cleaning the bottom floor windows. I.e. 1up and 2 up flat scenarios? Is there a lot of dripdown and would it dirty the windows below if it was dripping all over them. I'm just trying to get my head around everything. This site is brilliant, reading through all the posts is an excellent resource to starting. Just need to get out knocking doors now. I was gonna try do a month of canvassing to get some idea of numbers before i invest in the bulk of the equipment. Does this seem wise?