My grub screw got loose in the first week of owning the printer. It was scratching the extruder creating a large amount of metal shavings and ultimately got stuck to the frame jamming the extruder completely.
Cleaned it all out as best as I could but the extruder gear is damaged and filament is not extruding.
Easily avoided with a tiny bit of threadlocker on the grub screw but hindsight is 20/20
