Look familiar, you have got to keep the sand out of that area.
Here's 2 ideas I'm trailing!
The one on the left is firm but pliable plastic tube to increase the surface
area in contact with line loop
On the right is old line looped around neat and tight, tied off as a wear surface
Protecting line loop
Used both bars a couple of times but will need more use to evaluate.
Better off buying a new one looking after it, i know I've paid for a couple
Will post results in due course

P.S. line is sewn into the black tubing