Figure out what you can legally do as a landlord to annoy them
I don't think there is anything I could have done to make them annoyed enough to leave. They regularly told me that they didn't like living with me.
Since this thread has been resurrected, update for the kids at home:
I decided to split them up so they wouldn't gang up on me.
I gave roommate A a 30 day notice to vacate in late January. The letter didn't have a reason. He's not litigious so he didn't complain. He didn't tell roommate B that he was moving out until a few days before which is what I was hoping for. He moved out last Sunday.
I gave roommate B a notice to vacate last Sunday (no reason). She was very upset but hasn't made noises about suing. They were so enmeshed in their relationship it kind of made it easier because they were distracted. They also somehow thought that I didn't know about their relationship so didn't fuss at me as much as they could have, for fear of revealing anything.
Someone asked upthread what happens when roommate A comes back to visit. Well roommate A dumped roommate B (which is what I thought would happen) and I haven't seen him since.
It really all came down to a noise complaint. They had both quit their jobs, had no schedules, were sleeping all day and staying up all night, going up and down the stairs, cooking in the kitchen, using the bathroom over and over again until 2, 3, or 4 in the morning. It's impossible to evict for noise where I live so I had to figure out another way.
Until March 31st it's just me and roommate B. She a lot quieter at night now that she doesn't have a buddy and I'm finally getting some sleep!
Also I'm leaving out a lot of details. Their behavior was so ridiculous and I don't feel like writing a novel.