I have problem that wasn’t happening, and now is happening regularly, so I think perhaps a fan is failing? When I put some new filament in, it prints fine. But when I try to do a second print, extrusion doesn’t happen. When I remove the filament, I see a little melted crescent in it, right about where the hobbed bolt is in the head (see green box on attachement).
I lowered the temperature, and it helped for several prints, but now it’s back to doing it after every print. What could be causing this? Any input would be greatly appreciated!