The extruder makes a weird sound like moving an old door without an oily hinge - both when advancing or retracting.
This video shows the problem:
https://www.veed.io/view/055d1724-838a-48d1-98d7-8eaf3076ea2b?panel=share
I did everything, but the noise was still there.
Everything seems OK. I am trying to figure out what I should do. I took pictures from inside the extruder and shared them below.