How long should you spend washing your hands before eating?

OK, so I read this article on how workers at an eye bank spend at least ten minutes washing their hands with soap, to rid of all the bacteria. Since then I've tried to spend at least FIVE minutes washing my hands before eating - is this enough or should I spend more time? I always make sure the soap is in a good lather and wash every part of the hands, including wrists. Is there a way to avoid spending less time and not worry about harmful bacteria?