Using this eyeliner is easy. Just hold it like a pen and draw a thin or thick line along your lash line as you like. It dries fast, so be careful not to touch your eyes right after applying it. When it comes to storage, keep it in a cool and dry place away from direct sunlight. This will help maintain its quality and make it last through its 3 - year shelf life. Also, if you're allergic to any of the ingredients, it's best to do a patch test first. Enjoy your long - lasting and beautiful eye makeup!