How to cause narcissistic injury?

this ex room mate with narcissistic personality disorder (not self-aware of it). he tried to stiff me on the cleaning when we moved out because he "doesn't have the time, the energy or the resources" to clean. i don't either but he feels that he's entitled to a cleaning exemption. he goes to school and studies opera and claims it's really time-consuming. i don't care, he lived there and should FIND the time to clean. anyway, i'm looking for a way to seriously injure his narcissism. i want him to feel emotional and psychological pain from the way i treat him and hopefully he'll become aware of his problem. he shows all the traits of a narcissist and i'm seeking not so much to slap him in the face with reality but drop a sort of reality hydrogen bomb on him. ultimately, i want him to cry. what's the best way to induce narcissistic injury?