"After you’re done curling the hair, roll the hair back up and pin it with a clip," he says. "That's really essential, because then the hair can cool properly in that formation. While it's cooling, finish your makeup or finish doing whatever else it is you need to do. If you want the curl to loosen out, you can just let it hang."
Be sure to use hair spray to set the curls. (Banowetz recommends Tre Milano Shine Spray.) Then, watch your waves stay all day long. Easy!