How do I tell my roommate she stinks?

Bu

I'm not sure where to post this! I live in a tiny dorm. I think the smell is coming from her laundry. She has mild autism and she does some very strange things like sleep on the floor on my carpet instead of her bed. I think some of her smells might be going into the carpet too! She doesn't shower often. She also likes it super hot in the room so when she turns the heater on it makes the smell stronger. It is so nasty. I just want to wash her laundry and clean the whole room so bad! 😔 Also I barely ever see her! I go to bed at 10pm and leave by 8am. She comes to the dorm at 1am and wakes up at 12pm.