If you have any leftover eyeliner, just grab a new cotton swab and gently dab over it across your lash line. If your eyeliner is really stubborn, moisten a cotton swab with olive oil or castor oil and gently roll it across your lash line. Do not get the oil on the magnetic lashes, as it can damage the magnets. [3] X Research source
Unlike water-based removers, oils and oil-based makeup removers can leave residue on your lashes, which might weaken the magnets.
If you don’t have the lashes’ original box anymore, store them in a craft bead organizer or a pill box.