This curled, spiral structure appears on all my prints. But most notably on the support material. I am printing on a prusa core one. I already tried tensioning the belts and playing with the extrusion multiplier. Also dried my filament. The brown one is even brand new out of the packaging. With PLA it is very subtle on the prints itself, but with PETG it is so bad that I cannot print anything with supports as the print will fail due to all these holes. I contacted prusa support and they said that it might be the nozzle that is causing the problem. I use PolyTerra(or now Panchroma) filament which according to their product description is slightly more abrasive than normal PLA. Prusa said that this might have caused the hole of the nozzle to get slightly larger. Do you think that is plausible? I want to check before I buy any replacement parts.
Sliced with PrusaSlicer, default PolyTerra PLA settings(225 nozzle / 60 Bed). 0,2mm layer height. Issue occurs with all speed and height profiles. Retraction length is 0.7mm, retraction speed 45mm/s, deretraction speed 25mm/s, deretraction extra lentgth is set to 0. The brown prints are printed using PolyTerra PLA. The orange one is Prusament PETG.