Creality CR-10 Smart User Manual page 18

Before loading the filament
Tips: How to replace the filament?
1. Cutting filament near the Extruder and slowly fed new filament until they are fed
into the new filament.
2. Withdrawing the filament quickly and feeding the new filament after nozzle is
preheated and the filament is pushed a little forward.
Complete loading the filament