even with a properly working extruder, I sometimes strip filament, usually either extruding too cold or crashing the nozzle into the stage.
for a while, I was taking out the motor to clean it, which took.. a very long time.
I just realized that an unfolded paperclip will do the job without disassembling anything. just back out the filament, then keep the motor turning and pick around with the paperclip. It seems fairly easy to dislodge the plastic from the teeth and push it down into the barrel. This has already saved me a lot of time.
or.. did everyone else know this and I just missed the note ?