Possible frozen hot end fix

Oh, come on Gene. Please not back to messing around. How to properly calibrate your extruder, we have discussed here: Extrusion diff between part printed withe Marlin, and one printed by klipper - #4 by Sineos

Not at all needed. Just do a small retraction at print’s end (2-5mm) and be happy.

What the hell is a frozen hotend?