I have a flashforge creator dual.
From time to time while printing a model I notice when there are abrupt changes in direction, that a few "Grains" of old filament fall out from the head. Generally they end up embedded in the print which is not a big deal, but sometimes they get into a visible portion.
I can mitigate this somewhat by disassembling down to the gears, and blowing out all of the old filament.
My question is two fold
"What is causing these chips to accumulate near the gears?"
"Is there something I can do to resolve this issue?"