First of all, clean
At that time, it was a high school and the dormitory was not big. Six girls live in it. The first time we found the mouse, we made a thorough cleaning of the whole dormitory and cleaned up all the corners that we had never noticed before. When we cleaned the house, we didn't find a mouse hole, but there was a wide place by the door, so we were sure that the mouse came in from here. Then I found something to plug this wide seam. In order to be strong, I also asked the construction workers on campus to cement a layer. After that, all the food was put into the tin cabinet. Before, we put the lunch box in a small wooden cabinet, and then put our personal belongings in the iron cabinet. Now the lunch box is also placed in the personal tin cabinet.
Second, the rodent control action
After cleaning, we were all afraid that the mouse was still in the house because we couldn't find its hiding place. So, we bought a lot of sticky cardboard with mice on it and put it in every corner, such as under the bed, behind the cupboard, behind the door and so on. For safety reasons, in order to attract mice, we also put a lot of delicious food on the sticker. In this way, once there are mice in the house, they will definitely run to the place where there is food when they are foraging.
In this way, after several months, we didn't find the shadow of the mouse again, so we confirmed that there were no mice in the house. The mouse just got in through the crack of the door and should have run out.
So it is not surprising that there are mice in the dormitory. Do a good job in dormitory hygiene and actively find ways to solve it.