My brush stays on the glass at all times, lifting off the glass isn't always necessary, particularly on repeat cleans.
My own jets are of the 'fan' variety, so the whole width of the brush of covered.
I'll go back and forth regularly over the top edge, regardles of glass that sheets or beads, then on upstairs windows, I'll rest the brush very lightly on the glass and draw down.
O downstairs windows sometimes I'll be using the brush vertically, this way you also have a constant overlap as you work your way down the glass.
But I rarely have to hold the brush off the glass to do a separate rinse.
First cleans notwithstanding of course.
Beading or sheeting doesn't really affect how I clean the windows, I treat them the same as windows that sheet.
Beaded ones worry me more on a dry, windy day though.
As the beads stay there for far longer than if the glass sheets, it is also more likely to become contanimated with airborn particles, and I often wonder if that is the main reason that beading glass is more prone to spotting.
Regards,
Ian
