Tonight is a first for me... my machine keeps missing stitches as I free-motion stipple. The thread (which is GOOD quality) keeps fraying and then breaking. I changed the needle, messed and messed with the tension, cleaned out any lint that had built up, and I still keep having problems. The bobbin thread is the same as the top thread - 100% cotton. It is the same thread I piece with. I have NO idea what to do next... besides give up for the night and try again in the morning. :cry: