Drape the nylon over your ironing board. Orient the fabric so that the raised side of the crease faces up.
Set your iron to its warm or medium setting. Ensure that the iron is filled with water so that you will be able to emit steam.
Hold the iron roughly three inches above the crease and dispense hot steam over the fabric.
Place the iron lightly over the crease and move it gently back and forth until the crease flattens. Repeat steaming and ironing for each crease in the fabric.
Hang the nylon fabric up immediately after ironing to prevent any further creasing.