After Shah Rukh Khan and Ranbir Kapoor trying to quit smoking for the longest time, now Nawazuddin Siddiqui is attempting the same. The actor, who is a compulsive smoker, says that the erratic shoot hours take a toll on him and make it all the more difficult for him to kick the butt. “There was a time when I had even stopped thinking about how bad smoking is. But now I really want to quit,“ he confesses.