peter, since i have used the sl-x, which is a very stiff pole, i can get good scrubbing power, yes my work at 30ft is very good, also i take a bit longer to clean them if they really are dirty, i also send the young lad up and give me the thumbs up if they are good, if not, i do it again, its true what you are saying, it does take longer above 30ft, what i should have said, was, i rinse off on all domestic work, above 25ft i rinse on the glass, reason i rinse of the glass on domestic, is i do the frames, becouse i use pencil jets, i get into all the corners to flush the dirt down the side frames, rinsing on the glass misses all these parts, if you dont do frames, then this is ok