I use liquid eyeliner under my eyes and sometimes my lashes get in it and blur the line, creating dots of black on my upper cheeks. That’s the best I know how to describe it, sorry. Anyhow, if you have this problem ever, I have discovered a trick to help. Take a Q-tip and soak it against a make-up removal cloth. Just takes one second. Then wipe away the smudge (best to let it dry first) It should come right off. If it is very small you shouldn’t even need to re-touch with foundation. If you do need to, simply use the other end of the Q-tip and dab a little foundation on. Hope this works for you!