Loading

Report as inappropriate

when you print, the filament melts and deforms the tip into a small blob. If you pull the filament out while it is hot, it will conform to the inside of the cold end and slide through easily. As it cools, the filament distorts a bit and will jam if its in the cold zone causing a clog. this is why you must heat up the filament and extract a small amount before changing the filament.