Im using a MK8 extruder on my machine and lately i've been trying to get the settings right form it (currently i've 0.4 nozzle and 130 steps/mm at 215degrees) and when i start the print i usually get the first 3 layers done relatively okay, however since layer 4 it starts extruding really slowly (in such a way that the etxruded plastic is as thin as a hair, almost as if the extruder stopped turning at all, after some time there is no more plastic coming out.
does anybody know how to deal with this?