I use a live trap emptied at least twice a day,

I release them to the outdoors where they belong.

frankly i prefer to not kill anything unnecessarily.......

since something out there will kill me someday

I sealed the house well and dont keep a food source around. my big
mistake was the 50 pound sack of sunflower seeds............

with a plentiful food source, nice cozy house and one pregnant mouse.

over 40 went out in the live trap/ a few old geezers did die, probably
from old age and fear.. they were very grey like a old person.

dont kill them just relocate.