[pasbesoin]

It would have to be pretty dust/debris resistant, but could the helicopter -- or a simplified version of it -- be used to clear a lander's solar panels of dust?

I recall with previous landers, how solar charging performance would degrade, then pick up after what was surmised to have been a wind storm event.

[dredmorbius]

A dusting brush would likely be more mass- and energy-efficient.