Then clean it up and keep it clean.
Actually, rat poison is not good. According to experience, mice that eat will die (nonsense), but I don't know where to die. So, in that case, there will still be mice in the dormitory, and it will be hard to find them if they are dead and smelly.
Compared with rat poison, rat trap is better.
In fact, the most fundamental thing is cleanliness! ! Clean the dormitory (also effective for cockroaches) and clean the snack trash can in time.
There is also a folk prescription (my own experience. . . ), the cabinet is closed in time (needless to say), the key is not to be too neat and messy. . . In this way, every time you take something, you have to look for it, so it is not easy for creatures to stay in it, and it is not easy for them to go in and die. . .
It is also the key to dormitory hygiene. It doesn't have to be clean, but it's best not to have too much food residue and dirty clothes. . .