Using this MERZY gel eyeliner is a breeze. First, make sure your eyelids are clean and dry. Then, gently hold the eyeliner and draw along your lash line to create your desired look. For a more dramatic effect, you can add an extra line on the outer corner of your eye. If you have sensitive eyes, don't worry, as the creamy texture is gentle. After use, make sure to tightly close the cap to keep the product fresh. Store it in a cool and dry place, away from direct sunlight. And always remember to wash your hands before and after using the eyeliner to avoid any infections.