There are generally two kinds of mice on the ceiling. First, they come down the pipes on the ceiling to hurt, bite, excrete, steal food and engage in sabotage. Second, they don't come down and just move on the ceiling. They only hear their voices but can't hear their mice.

In order to survive, mice need to eat and drink, and food is usually placed below, so mice can only come down if they don't want to be hungry. You can set some traps and catch mice with sticky mouse boards. Indeed, there are too many rats, so it is necessary to put rodenticide and kill them chemically.

Killing rats is a long-term and continuous work, and it is also a process of fighting rats. Good luck.