I'd would think that the software designers would have put in place a command to retract and restore the antenna and solar panels for the case of lack of recent contact. So that on its own, it tries to shake off dust.
You do remember that the thing’s original mission was something on the order of 90 days? Earth-days, that is?
Can’t Sheila Jackson Lee go up there and dust the damn thing? Take one of Hillary’s wipes.