Using this eyeliner is super easy. First, make sure your eyelids are clean and dry. Then, gently glide the eyeliner along your lash line. For the highlighting part, use it on the inner corner of your eyes or the area just above your lash line to make your eyes pop. For shading, apply it a bit thicker on the outer corner of your eyes. When you're done, let it dry for a few seconds. To keep it in good condition, store it in a cool and dry place. Avoid getting it wet and don't expose it to direct sunlight. Also, if you haven't used it for a long time, give it a gentle shake before using it again.