Using MERZY Gel Eyeliner is super easy. First, make sure your eyelids are clean and dry. You can use it as an eyeliner by carefully tracing along your lash line with the 3.5mm tip. For a smoky eyeshadow look, smudge it right after application. When you're done, let it dry for a few seconds to ensure a long - lasting effect. As for maintenance, keep it in a cool and dry place. Avoid exposing it to extreme temperatures, as this can affect the texture. Also, don't share your eyeliner to prevent any possible infections. Enjoy creating beautiful eye looks with MERZY Gel Eyeliner!