DOCS: need a tutorial on how to clean nozzles

[HaythamB]

Should contain what an unclean nozzle looks like, and explain how TAMV detects the nozzle such that any user may understand what they need to do in order to run it successfully.

Also include images of clean and unclean nozzles for reference, and a sample set of cleaning steps (cleaning with silicon/nylon brushes, using acupuncture needles to push back filament into nozzle throat, etc)