I just scratch my finger nail down the side and it usually pops out ,I do have a little trouble with some ,but get there in the end.I alway rewind mine onto a Janome bobbin ,the last lot of NEB ones I bought are knotted onto the bobbin , my reapir man said it could wreck your bobbin shuttle if you run them through to the knot
Well I bet if you toss it across the room the end would soon unravel!
Had this happen once. With all the scratching in the world the end would not come out. I eventually cut near where I thought the end was. Only wasted a couple of inches. Good luck. Sarah.
I scratch and then get a pin and pick untill I find the end.Sew for fun
Diamond
I just kind of scratch across the threads with my fingernail and can usually find the end. Haven't had to throw one away, yet.