Using these magnetic 3D eyelashes is easy. First, use the included tweezers to pick up a lash. Then, apply the magnetic eyeliner along your lash line. Once the liner is on, place the lash carefully on the liner, and the magnetic force will hold it in place. As for maintenance, after each use, gently remove the lashes. You can clean them with a mild makeup remover to keep them in good condition. Remember, keep the lashes away from water when not in use to maintain the magnetic strength. Also, don't pull too hard on the lashes when removing them to avoid damage.