I am having severe under extrusion issues with my Ultimaker Original with heated bed and dual extruder upgrade and I don't find a reason for them. I bought the printer used and at the beginning it did not have these issues. I am having the under extrusion issue on both extruders. I am using original Ultimaker PLA, I have only one spool left, new material will arive tomorrow.
I would say it started since I upgraded to the latest firmware version but I am not sure if that's the reason or if it's just assuming it, because it was in the same time frame.
What did I do to find the pr