Mice can destroy many of your possessions---including furniture and books---by gnawing on them. They can also contaminate your food. Mice also spread diseases and pollute your home with droppings. If you suspect your flat has mice, sprinkle talcum powder over possible entry areas. Check the powder for mouse tracks in a day or two. Successfully getting rid of mice in your flat requires preventing more mice from entering, as well as killing existing mice. If the pest problem affects the entire building, not just your flat, you will also need the cooperation of your building manager.
Seal possible points of entry for the mice. According to Pest Control, mice can enter through holes that are only a little bigger than ¼ inch long. Seal all cracks with copper wire mesh and ensure that all your windows properly close. If your door has a gap at the bottom, install a door sweep.
Create an inhospitable environment for pests. Do not leave food lying around. Keep your flat completely clear of all crumbs. Pantry items may be kept in plastic storage containers.
Survey your flat. Are there particular areas where you often notice mouse droppings or gnawing? Concentrate your mousetrapping efforts in these places.
Place multiple snap traps approximately 6 to 10 feet apart, as recommended by the New York State Department of Health. Mice prefer not to cross large, open areas, so place the traps at a right angle against a wall. Arrange them so that the trigger end of the trap touches the wall. Add bait by smearing crunchy peanut butter to the trigger end of the trap.
Check your traps every day. Move your traps elsewhere if they have not caught any mice in a few days.
Wear rubber gloves when cleaning up dead mice or their droppings. Thoroughly disinfect the area with bleach.
Contact your building manager or owner if your mouse problem persists. It may be possible that you have a neighbour who does not have hygienic housekeeping practices. Your neighbour could be creating a mouse problem, which may have spilt over into your flat.
Place a newspaper sheet under each mouse trap to make cleaning up easier.
Avoid using poison to kill mice, as it could endanger children and pets. It could also create an odour problem, as mice may crawl inside a wall to die. Keep mouse traps out of reach of children and pets.