will loosen. a simple twist with a screwdriver will solve that.
for the most part, the dead mice look just fine. i do take them outside and place them in a tree where they are typically taken as food by one of the local big birds. much of my yard is a mouse house as it were. there are plenty of places where they live. nature has a way of providing for them both with food and shelter. so as long as they stay out of my house, i leave a big chunk of my yard alone so they can do their mouse things.
we try to keep the mice out of 