Grey-looking filament is being extruded

Ensure that the filament is feeding consistently and without interruptions. If the material is insufficient in the barrel, the screw might rub against the barrel, leading to potential metal scraping. To check for this issue, use an Airpath magnet near the filament; if the filament responds to the magnet, this may indicate a worn barrel or screw. If you suspect this is the case, contact support for further assistance.