Using this eyeliner is easy. First, hold the pen like you would a regular writing pen. Gently place the tip of the brush on your lash line, starting from the inner corner of your eye and smoothly drawing towards the outer corner. You can build up the color gradually until you get your desired intensity. Remember to close the cap tightly after each use to prevent the liner from drying out. Also, keep it away from direct sunlight and high temperatures. If you accidentally get it in your eyes, rinse immediately with clean water. With proper care, this eyeliner will last you a long time and keep giving you beautiful looks.