Instructions
Unwind your yo-yo string. Let the string hang from your hand with the yo-yo suspended at the bottom.
Use the hand not holding the string to spin the yo-yo counterclockwise, still suspended. This will untwist a coiled string to make sleeping possible.
Wrap your string around the axle of the yo-yo once more. Start with loose wraps for the first few passes and tighten slightly as you continue winding.