Learning how to apply liquid eyeliner perfectly every time is practically impossible, and eyeliner mishaps happen even to the pros. Luckily rogue lines and smudges are easy to fix.

Dip the edge of a small square brush, such as M.A.C. 239 Eye Shader Brush, $25, in a silicone-based eye cream (try Olay Regenerist Eye Lifting Serum, $21.99) and do a quick sweep to clean up your liner. The silicone-infused formula will make sure the rest of your makeup won't smudge or change, Blair says. If you end up with an asymmetrical cat eye, you can use the same technique to shape and refine the edges of each wing.