2 of the guys who are asking are new to water fed pole and wants to know how to prevent spotting.
one of them thought it could be because the window beads (hydrophobic) and I told them basically that the beading window rinse just as good as the windows that shear (hydrophilic).
Its not over thinking Form b, just an explanation!
Matt
that's right windows that bead come up as good as windows that sheet, If you are getting spotting then something else is causing it...
The reason that most window cleaners like windows that sheet is because it is less likely to mark as the water is not staying at the top of the frame to pick up contamination...
We are working on a video that shows the problems about spotting and giving some tips on how to help, Video will be ready soon Promise

Adders