Perimeters disappeared during print
Hi everyone, my printer is an Anycubic Kobra Neo, I am using Prusa Slicer 2.9.0 for my prints and the filament is ELEGOO PLA. I've been consistently using this set up for the past few years and haven't had any major issues so far. However, two months ago, my prints suddenly started deteriorating, especially around the perimeters and in my most recent print, the perimeters completely disappeared. The pictures below are my most recent prints, in the slicer itself everything is normal, and the layers are showing but as you can see in the print, its as if my perimeters are completely gone. However some areas like the first layer and top layer are completely normal.
Things I've tried to resolve this problem...
1) Setting nozzle temperature higher -- didn't work
2) Setting the nozzle size slightly smaller so the layers would squish together better -- didn't work
3) Added some covers to stop draft -- didn't notice any differences
I also purged a bit of filament to see if theres a filament issue, and based on what I see the filament flows down quite well. I'm not really experienced with filament quality though so my ability to identify whether its a filament issue or not is limited, but I don't think it is.
.stl and .3mf files can be downloaded here
Does anyone have any suggestions on how I can fix this issue? Thanks!
