Left extruder damaging filament?

[Natsuya]

The same symptoms appeared for me.
I found that the nozzle is blocked only when printing with a specific filament, whether Artisan (Dual Nozzle) or Snaomaker 2 (Single Nozzle).
That filament is Snapmaker’s PLA black .
I believe that the quality of Snapmaker’s PLA black is likely poor.

3d print head keeps clogging

First 3 4 hr prints worked fine but only with a certain color (blue) every time I load snapmaker 1.75 white or black PlA it will either print 2 thin or after an hour so it stops printing, machine continues to move but no material comes out. I have tried removing the print head and cleaning gears as well as using needle to clean out clog I have also forced material through the print head by hand but again same problem getting very frustrated with the 3 D side of the artisan