Mice are very cautious and they move from place to place by staying close to fences, walls, bushes, and other areas where they can take cover. If traps are not placed in the correct place, it becomes fairly easy for mice to avoid them. When mice have taken over an attic, it is best to place traps in the corners and along the walls. If mice are in the same areas of the home used by humans, traps should be placed behind appliances, in corners, and in cabinets.
Traps should be placed between two to ten feet apart and you should invest in three traps for every mouse. While you may not know how many mice you are dealing with, the takeaway is to lay more traps than you think you need so you can be sure to catch them wherever they are.