I recently got into 3d printing and have been having some issues. First, I borrowed a Makerbot replicator 2 from a friend and was not able to complete a single print. The print would start, get a few layers in, and then, a clicking sound would start and it would stop extruding. This happened every time, even after I went in and cleaned the gear off with toothbrush. Recently, I brought a Printrbot Play. I printed a few small things successfully. Then, suddenly, the same problem started again. When I examined the printhead, i could not see a speck of filament on the gear. As with the Makerbot, when I took the filament out and put it back in, it extruded again for a few layers, than stopped. Is this something that I am doing, (perhaps putting the filament in wrong?), or is there something I am missing.
Thanks