history: My roommate left leftovers in the refrigerator for a week. The dishes were moldy. My roommate leaves leftovers in the fridge and they get moldy. That sounds revolting! Have you said anything to him about it?
current: No. I'm not very confrontational. And our lease is up in two months anyway so I'm just going to wait it out.
next: That sounds like a good plan. Perhaps you should request a formal resume from any potential roommates for your future abode.