I use wfp now but did 20 years using an ettore reach pole and backflip, never ever had a complaint. you can still clean the lower frames and nobody ever moans about the upper frames.
Go on you tube 'unger tutorials' there is a module on cleaning at height which shows you the best way to do it.
Basically cut the top edge and wipe the blade every two pulls and you will be ok.
practice makes perfect.
I still use the pole and when I compare the cost to what I've spent on wfp I wonder why I ever changed.
The trad pole is great, no set up time and quick to use, safe in all weathers and the customers like me using it.
hope this helps.`