Dust

The vanilla way of doing this (that I've discovered) is to first hold down control with your pinky, then tap shift with your ring finger. As long as you tap the throttle and don't hold it down for long it will only send out a tiny pulse of very low thrust. Useful during landings, and that last bit of orbital maneuvers.

You could go into your quicksave, find your probe, find one or more of the solar panels and change it/them from "stateString = RETRACTED" to "stateString = EXTENDED". But of course that would be cheating...