I knot them. I weave it through a bit and then separate the yarn in two, thread half on a needle and take a stitch then tie in a square knot and clip close to the knot

What a great idea! I'm going to try it.

I crochet over the ends when I change colors then weave them in going one way then the other back and forth a few times and they stay put. I was taught to never use knots so that's how I do it. Mary

I'm glad it works for you craftylady. It never did work for me and the knot in a single strand of wool isn't even noticible in the finished piece