The Knit Picks Ball Winder is a great, inexpensive ball winder. I love them so much that I have owned two of them. Unfortunately the Knit Picks Ball Winder has a tendency to slip gears. When this happens, your beautiful yarn cakes turn into a loose, tangled pile of mess. In this article I am going to show you how to fix a broken Knit Picks ball winder, step by step.