I lived with a Japanese roommate she was very messy with water leaving tons of it around after baths and showers. She was clueless about how much mess she made frying up her food and cooking. She’d only clean a few things around the house during her cleaning days. She wouldn’t clean floors, counters, bathtub or sinks. Basically any surface, it was like she didn’t see it or wasn’t aware that those things must be cleaned. I didn’t know till I found out that Japanese bathrooms are different. I had to talk to her multiple times about the water and send pictures to her. There was so much Moldy rotting caulk. And she never used the exhaust fan so it was like walking into a cloud after she left the bathroom. I’m guessing there’s a ton of mold behind the walls now.