I know this is an old thread but I just saw a great hack on YouTube so it’s not my idea.
simply snip off the tip of a NERF dart. Then cut it lengthways.
Undo your cable plus/ports. Put the the foam sleeve around the cable and secure with a bit of sticky tape. Slide as many as you want/need up the tube.
NERF darts are cheap and easy to purchase. Takealot and toyshops stock them.
Link to video
