The Rodent Guide
Draft stoppers work by blocking off the area at the bottom of the door so nothing can get through… draft, mouse, insects, etc.
I would actually use 2 towels. Start with one, and try to get as much of the towel under the door as you can. Leave no gaps!
The most important thing that you can do to stop mice from getting under your door is to ensure you clean up thoroughly.
Pick small items of clothing and wedge them under your door when the door is shut.
If you are getting desperate and nothing else is working, stopping a mouse from going under a door, you can crunch up some aluminum foil to push under the door.