When beading with Stretch Magic thread, how do you securely tie it off so it won't break?

I have just started beading using Stretch Magic and I love it! The only problem I'm having is that the knots that I do (several) at the end of my "project" (necklace, bracelet, etc.) is that the tie offs I've been making are not staying. Is there a trick to this? Should I add a small dab of Welder's Glue to be sure the knot does not come undone?