It Gets the Red Out My best friend is also a fellow bartender. We had a man who would come in and hit on anything with legs. Thought he was quite the stud muffin. After about a month of his rude behavior and his bitching that we just couldn't wait on him fast enough. (And he never ever tipped) We decided that we had had enough. So we constantly made sure his drinks were full and we used a whole bottle of Visine in his drinks that night. Laughing hysterically over his rushing to the bathroom constantly. After about 3 nights of this he made a comment that every time he drank there that he got the shits. Imagine that!!! Eventually he stopped coming in!