The cable to the extruder sometimes comes loose during printing and apparently there should be a gcode file on the USB stick that came with the printer for some sort of clip, but it's not on the stick I got with my printer, surprise, surprise. It's mentioned on the Creality wiki: https://wiki.creality.com/en/cr-series/cr-10-se/quick-start-guide/u-disk-random-file-model-printing-instructions It's also not on the unparalleled Creality Cloud. Maybe someone has this file?