Mice often try to overwinter in the warm indoors of a home; they get in through gaps and doors. Mice can also climb high and far, entering through the roof, plumbing, or stowed away in boxes. They are ...
"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you suspect you have a mouse (or two) in the house, you might be dealing with a larger problem.
This kitchen staple may do the trick.