Separate the hair into sections as you would when working with a curling iron. Work from the underneath sections of the hair towards the outer sections. Slide the iron down the shaft to warm the hair to prepare for molding the shape with the iron. From the base of the section, place the hair between the iron plates, holding the iron at a 45° angle, and turn the iron. Use your free hand to guide and hold the iron closed while manipulating the iron in one turn. Slide the iron down the hair shaft using even tension against the outer edge of the iron (which shapes the curl formation). Keep the hair on the upper portion of the iron plates, and watch that the ends do not slide out of the plates. Slide down the entire length of the shaft through the ends, maintaining the same angle. Once the ends pass through the iron, release the hair and see the curl pop out. The slower the movement, the tighter the curl. Do as much of the hair as desired, the spray with extra strong hair spray for longevity. For waves, position the iron more parallel to the floor, rather than at a 45° angle, during the entire process.