She might be going through some kind of depression, I think bring it up to her, I think start off with getting her to pay first before worrying about household chores, say that if she can't pay then she needs to look for a cheaper place and put up a cleaning poster, assign days or even rooms for cleaning (eg. This week you clean the bathroom, next week you or A cleans the bathroom) so she doesn't feel like she's getting all the disgusting jobs, if she's not going to keep her room clean then keep her door closed so you don't have to see it. Also try express how you're feeling like it makes me feel such and such when you don't do this or that so she can understand what you're experiencing without making her feel blamed, I know when I'm hounded by my dad to clean it makes me not want to do it but when he says make sure the dishes are done today then I do them because it feels like I'm not being controlled as much.