If it is veg tan .......... maybe very warm water ? I guess you would need to lightly dampen the entire side to avoid any water spots , just go heavy on the edges with the warm water . Good luck and let us know the fix you come up with !
Still playing around , this is rubber tubing contacted to the leather arrowhead . It has quite a bite on the thong , if the contact holds up this will be how I do them . I know slides are cheap but so am I
Decided that I needed a bolo , not having any hardware this seems to work right now . Holds fine being new and not used much but don't know if it will for any length of time .