My wife and I rented a room to one of her friends she had known for years. Good deal for us, the rent $. Verbal agreement (BAD IDEA, always get an agreement in writing). Same kind of deal you have. She was supposed to help clean, do dishes, etc. In turn, we bought and cooked enough food for her.
After 3 months, she was not doing s***. She began using our paper plates and plastic utensils, to get out of dishes. She invited whoever she wanted into our home. Most were really trashy people too. Would come home to find my garage blocked by an oil dripping POS, driven by an idiot friend of hers.
Well, my wife and I decided enough is enough. We told her she needs to keep her end of the deal up, or move out. It never got better. The following week she:
1) Took a monumentally horrific s*** in our toilet, backing it up, and leaving the baseball sized and shaped crap floating around. She refused to clean it up. I had to bang on her shut and locked door for an hour to get her stank ass out to unclog it. So gross.
2) Went out drinking on a work night for my wife and I. got woken up at 2 AM by her banging the s*** out of the front door, waking the dogs. I did not know it was her, so I was stumbling around in the dark, trying to load my gun because I was getting robbed or something. She stopped banging, then called us on her cell phone asking to be let in. Not even a thanks when I did.
3) Made a gigantic mess in our kitchen, leaving all kinds of s*** on the floor and counter, went to her room, and blasted her lesbian techno crap. Oh yeah, did I tell you, she was gay. Not in a cool way though. Ick is more like it. Skinny butch.
Either way, the next day, we told her that she needed to get the **** out. Two days later, she did. In the process, the cops were called when I tried to stop her from stealing some of our furniture. I went apeshit on her verbally for trying to steal our stuff. She called the cops. The same cops I called before she showed up to move her stuff out. She was told to move everything out and not to come back.
The ******* b**** still owes us rent for the month she was there, damnit.
We learned that we will never, ever, ever, have another roommate. Also, get a written agreement, so you can evict them if they screw up.