Despite many honest, experienced guys on here telling people that 10 windows/doors can be cleaned in 10 minutes with WFP - I just can't do it!
It takes me at least twice as long, sometimes longer.
I just wouldn't be able to trust the outcome after such a quick clean.
All right, I've not been doing it as long as some, and might not have refined my techniques enough - but - I can't even do it that fast on my own house (and even after 15 cleans on my own house, I still muck up the odd window - see my earlier post "that little bit of frame above the openers")
Mike