coppertea

Hello! my 3d printer (flsun prusa printer) for some reason has suffered a huge loss of print resolution, going from something like this: to something like this: (it's supposed to be a chicken) I THINK ~ the issue is that the hot end won't raise up on the Z axis enough. whenever its running, i hear a slight grind every once in a while as the hot end passes over cooled filament. IVE TRYED ~ slowing everything down (putting everything on 20), lowering and raising the hot end temperature (its PLA so from 190 - 210), and updating the marlin software. Any Advice?