I had a shop (business) when I was 29. It needed a lot of TLC before I could open and do business. So mice and rats had been there for a long time. Once I got everything in order and was working, I decided to set up a small mattress in my office so that on nights when I was working late, I didn't have to make the 30 mile drive to my apartment. That was the plan anyway.
First night I decided to stay over, I had the AC blasting and showered and crawled into "bed". Turned out the lights and fell asleep, minutes later I awake after hearing some rustling and feeling something moving on the covers. As I was laying there I look down and saw a little rat right about at my waist staring back at me. Needless to say that was the first and last time I ever tried to sleep there. Scarred me for life.
What got rid of them was one thing. Poison. I hated to use it but I had too. If you have alternative ways of getting rid of them that's better than poison, because they suffer for several days before they die.