MakerBot/clean gear mechanism

Target Audience
Someone who suspects that the print head is not clean, is extruding randomly globs and then nothing.

Starting Point
Makerbot has had the PLA removed and has cooled down.

Replication Goal
Take print head apart, possibly clean, and put back together so it works.

Procedure remove printhead
The steps in this video] were not followed exactly. The grill, fan and heatsink should be kept together with the screws remaining in the assembly. Watch the video all the way through first. The stepper motor gear cleaning happens in the second half of the video.