How To Stop Mice Getting Under Your Doors In 5 Steps Sweep The Floor. The most important thing that you can do to stop mice from getting under your door is to ensure you clean up thoroughly. Clothing Under Door Frame. Pick small items of clothing and wedge them under your door when the door is shut. Aluminum Foil. Click to see full answer. Hereof, what can I put under my door to keep mice out? Employ mouse repellant. Mint plants planted around your windows and doors will repel mice. You could also sprinkle peppermint or spearmint essential oil around your house. Bay leaves. Tuck them into the corners of your pantry and cabinets, or crush them up and sprinkle them in your windowsills. what scent will keep mice away? peppermint Subsequently, one may also ask, can mice go under doors? If a pencil can slip under a door a mouse can get under it. Mice and rats can flatten their rib cages to fit through gaps, if their head can fit through, their body can follow. Gaps under doors can be sealed with draft excluder. So keep doors and windows closed at all times if possible.Do door sweeps keep mice out?Keeping mice out requires a door sweep with a little more rigor. You should test doors with sweeps even if they look well installed. Mice will either push through these sweeps or chew off a few bristles.