Flashforge Dreamer (NX) - Solving Under-Extrusion Problems by Cleaning the Nozzle and Replacing Tube

In this video I diagnose why I've been having under-extrusion problems lately by disassembling the Nozzle and Heat Break Tube.

I also use a "cleaning" filament to help keep the nozzle clean especially when switching between PLA & PETG filaments.

Based on what I learned, I've decided to stick with the nominal temperature limit of the printer (240 degC max) even though you can set the temperature of the extruder higher (up to 248 degC).

I'm able to print PLA & PETG at 240 degC or less, so there's no reason to go higher even in a cold unheated garage.

Link to Micro-Swiss HW-NOZ-MK10-04 MK10 Plated Wear Resistant Nozzle on Amazon:
https://smile.amazon.com/gp/product/B01BDL4NKM/

Link to Authentic Capricorn PTFE Bowden Tubing (1 Meter) XS Series for 1.75mm Filament with PTFE Teflon Tube Cutter on Amazon:
https://smile.amazon.com/gp/product/B07PS3NH82/

I used NovaMaker cleaning filament, but it's not on Amazon right now. Here's another one that's probably just as good:
https://smile.amazon.com/Monoprice-Premium-Printer-Filament-1-75MM/dp/B016QUH514/
Here's another one:
https://www.matterhackers.com/store/3d-printer-filament/cleaning-filament-1.75mm

Flashforge Dreamer NX on Amazon:
https://smile.amazon.com/gp/product/B07DPBRCYZ/

Link to Bed Adhesion and Layer Cracking Test
https://www.thingiverse.com/thing:4536632

These are the tweezers I used to help remove dripping filament from the print head:
https://smile.amazon.com/gp/product/B0845SKD7Z/

This is the wire brass brush I use to clean the nozzle tip:
https://smile.amazon.com/gp/product/B01J2BS92S/

These are the spatulas I used to help remove the pieces from the print bed:
https://smile.amazon.com/gp/product/B075SLTY8B/

OpenSCAD website:
https://www.openscad.org/

I used Simplify3D slicer software for the tests:
https://www.simplify3d.com/

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Link to my Etsy Store:
https://www.etsy.com/shop/BetaCygniDesigns

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End Screen Video Acknowledgement: Cosmic Reef Video produced by NASA and the Space Telescope Science Institute (STScI).
https://hubblesite.org/contents/media/videos/2020/16/1277-Video