How to Apply Fake Eyelashes Like a Pro

"For peace of mind, you can go back with an eyeliner brush if you feel that you've missed some spots," Jennings says. "You can just dot a few pieces of glue just for reinforcement. So if you see any gaps, you can absolutely fill and adhere the lash."

In case you're worried about stiffening your brush, just wipe off the excess glue and the rest will come off with soap and warm water.