Brushing the dust off is likely to degrade the panels anyway due to the abrasive nature of the dust. I believe the idea was discounted due to this, and also the weight of the brush mechanism that would be required.
Brushing the dust off is likely to degrade the panels anyway due to the abrasive nature of the dust. I believe the idea was discounted due to this, and also the weight of the brush mechanism that would be required.