Hi Rich,
It’s very hard to describe in writing how exactly it’s done. Firstly you must have the right brush, a car washing brush or broom head simply won’t do, a good flow rate and of course the correct technique.
It’s all about having the right tools, knowledge and skill to get the whole procedure right.
A brief description would be, (taken from an old post of mine)
Rinsing with poles over 25-30ft you need to use a whole body technique which takes a while to master, its sort of like a ballroom dance step but who cares what you look like though if its saves one from injury then its worth it wouldn’t you say.
Always keep brush on the glass, move around I mean really sway and step back and forth for the scrub not moving your arms just letting your steps control the motion of the pole. Then obviously start at the top with a little extra attention to see the jets wash right up to the top of the glass then with small up down jerks (rather than a zig zag rinse) work you way back and forth a cross and down the glass by doing this action you should be stepping slightly left to rinse the right side and visa versa when you step left or right you slightly drop the pole the other direction.
You can only do the steps and body technique with brush on there’s no way you can do it lifting off, the whole technique is the way your supposed to use wfp anyone lifting of is at serious risk, there is no need to lift off at 18ft or even mini-pole 4ft work no need whatsoever!!!
Have a go on your own windows and see

ProPole