This is the solution for snapping metal cord in clothes dryers. Designed to be easily 3D printed from PETG, making it flexible enough to go on the dryer while still being durable and resistant to breakage.

Important tips for installation:
If the fallen-off part is too thick, the metal wire won't fit into the model. If that is happening, what I would say is, heat the edge of the cable and really push it in, allowing for the cable to go in and once it has cooled, it will be fitted firmly. I recommend heating the line, even if it seems to go in without a problem, to give it a better grip and prevent it from accidentally slipping out.