We make a remover called Shake It Off that's formulated to remove Magnetude Magnetic Eyeliner but you can also use any 2-phase makeup remover (shake up type).
It's best to wash your face first then use a cotton pad with your remover on it. If you have difficulty removing the liner hold the pad over the liner for a few seconds to soften it.
It's important that you do not clean the lashes or magnets with liquids. This will damage the lashes.