Step 5: Prevent them from getting back in.
Start with the outside of your home and make sure any shrubs and branches are cut back, away from your house. “Otherwise, they’re like highways for mice and insects to get into your home,” Mannes says. Go through your home from top to bottom and close up any potential entry points for rodents. Professionals suggest using steel wool to close up smaller holes and wire mesh for bigger holes.
Additionally, do little things inside your home, like putting cereal, grains, etc. into airtight canisters, or avoiding leaving pet food out in bowls on the floor.