Start by identifying what needs to be fixed: Is one side thicker than the other, or is one too thick? Is your line curving up on one eye but flatter on the other? Pinpointing exactly what’s wrong with your lines will help you fix them faster and on your first attempt — not your fourth.
Next, wait until your uneven liner is completely dry and grab a Q-Tip. Soak one end into a little liquid makeup remover like Lancôme Bi-facile, and slowly glide it along the part of the liner that needs to be evened out. You should be able to drag the Q-Tip across and neatly wipe off the excess liner.
After you’ve swiped your cat eye into an even shape, grab another Q-Tip and pick up a dot of concealer. Dab the concealer underneath the liner to even out the area. (Chances are the remover also removed concealer, and it may have even left your skin a little pink.)