A sewing machine is a fantastically useful thing to own, but too often sewing machines end up languishing in a closet because something wasn't working quite right the last time you tried to use it.

Question: Can you tell me why, when I come to the end of a seam, the threads get bunched up on the bottom layer? It doesn't always happen, but when it does, I find it so annoying. _ Mrs. K.N., Prairie ...