Anti-static
I wonder if needles with high voltage AC could bleed some charge out of the dust. It might suck up a precious 20W or so but maybe it only needs to run for a few seconds after a dust storm so that the dust can be shaken off.
The self-cleaning reflectors along roads are brilliant but I suspect that wind powered brushes are more like wind powered grinders on Mars.
Biting the hand that feeds IT
