Since waterproof makeup is, well, waterproof, you won’t be able to remove it using water. Instead, you’ll likely need something oil-based. If you can, use a waterproof makeup remover or micellar water. But if you don’t have either on hand, look for something that’s oil-based—and gentle enough to use near your eyes—like petroleum jelly. (Try not to make a habit out of this, though.)