Add Yahoo as a preferred source to see more of our stories on Google. Mothballs are ineffective at repelling mice. Using mothballs outdoors can harm the environment. Seal gaps and use traps to ...

Mothballs emit a strong, unpleasant odor, but they are ineffective in deterring mice. Despite this myth's persistence, mothballs fail to keep mice out of homes. Understanding why mothballs don't work ...