Using this magnetic eyeliner is a breeze. First, clean your eyelid area to ensure there's no makeup residue. Then, apply a thin layer of the eyeliner along your lash line. Wait for a few seconds until it starts to dry, but still feels a bit tacky. Next, place your false eyelashes on the eyeliner, and the magnetic force will hold them in place. As for maintenance, keep the eyeliner tightly capped when not in use to prevent it from drying out. Store it in a cool, dry place. Be careful not to get water into the bottle. Also, if you have sensitive skin, it's a good idea to do a patch test on your wrist before using it on your eyes.