The Spanish striker has become increasingly frustrated at his treatment by Premier League defenders and has been involved in a number of verbal spats.
Benitez said: ''I have told him that he has to stop this. He knows he has to improve this aspect of his game and that the way forward is to respond to any intimidation by scoring.
''Sometimes it is not easy to deal with everything opponents do but he knows he must deal with it in a different way.
''In his first season, he was really focused and I think he will be again now. He is a star now and defenders are really worried about him but that is part of his game these days.''