Wipe off the eyelid oil, and then press out the double eyelid with the Y-shaped stick to confirm the position.
Close your eyes and apply glue along the double eyelid position, let the glue half dry.
Press the double eyelid with the Y-bar and open the eyes.
Use the other end of the straight stick to gently pull from the top of the eye to the bottom of the eye to make the double eyelid more clear and distinct.