Wet Towel
A Redditor told the story about one of their worst roommates and his hygiene problem. He always showered but this wasn’t the problem. The tension emerged from what he did after he emerged and tried to dry himself. It also resulted in the roomie suffering from horrendous back acne.

“I had a roommate who believed that when he got out of the shower he was clean, so his towel was never getting dirty by drying him off,” they wrote. “So he would never wash it with his laundry. It just smelled worse and worse and worse as the semester went on.”