Snap traps and electronic house mouse traps are commonly used for killing mice.
Catch mice attic.
If you have mice living in your attic it is likely that they are traveling down through your wall voids to access areas of your home that have food or water sources.
Bait a humane rodent trap available online and at most home depot stores with cheese or peanut butter and set it in your attic.
Lethal traps on the other hand catch and kill the mice instantly.
This is mostly done in a painless and quick way.
Check the trap daily and relocate the mice you catch several miles away from your house.
You may notice recent gnaw markings as well as fresh mouse droppings around your house and attic space.
To use this funnel leave one opening unsealed and position the funnel over it.
Gnaw marks can be found on just about every hard surface such as your floor rafters in the ceiling house siding electrical wires ventilation ducts and areas around pipes inside your walls.
One way exclusion funnels are also useful in removing mice from your attic.