I have a "thread eater" too! I keep all my thread in a drawer, and every time I leave the sewing room I have to take my thread off the machine and put it away. I keep the door closed when I am not in there, but sometimes she sneaks in when I am ironing or sewing and she hides and I do not know she is there. So I have to be religious about pulling my thread off the machine and putting it away. It is a pain in the neck, but not nearly has much trouble as the alternative!