Here is a bow where the head was broken off and I repaired it about 15 years ago.

Just recently the stick cracked in a new place before the head and somehow some cloth fibers most likely from the case were jammed into the crack. I tried to get all of the fibers out of the crack and then glued it and wrapped the crack.

IMG 20200513 115831 3

IMG 20200522 142813 4

IMG 20200522 142937 1