A while ago I got the Anycubic Vyper, and it worked fine. It worked until about 2 months ago when the filament started stripping, and the printer stops extruding. I have tried adjusting the pressure screw thing, cleaning the extruder, cleaning the extruder, cleaning the nozzle, changing the filament, and adjusting temperatures. None of it is working and I don't know how to fix this issue.