How to replace filaments1.Install the spool on the spool holder of a 3D printer, and preheat the nozzle2.Cut the top of the filament into a spire shape, and thread it into the extruder and feeding tube3.Manually push the filament through the feeding tube to the nozzle, until the filament melts through the nozzleExtra attention neededWhen installing and replacing filaments, make sure to heat the print head (heated to above 200°C), otherwise the print head might get clogged.