ROTF, cat farts stink terrible, lol. It's takes alot of patience and is a very tedious task. There shouuld be a hole or a groove in the part you wrap the string around, you want to make a knot in the end of the string so it doesn't slide through the groove or hole, then you start the tedious trial and error part of rewinding the spring. There's no way to explain how to do that. Just takes lots and lots of patience.