Dryer sheets, mothballs, perfume soaked corn have all been mentioned before on this site. Seems that anything sweet or aromatic smelling they dont like and stay away from.. I use mothballs mostly in a small tupperware(dont tell my wife)with a few slits in the top and seems to work pretty well. If you have the cab that ran thru 1991, open up the bottom of the overhead and take the panel off the filter area on the right side. Mice like cozy confined spaces that smell like pee.....Eliminate what you can that they like and they may not hang around.. If you have electricity close by, get an electronic pest chaser from your hardware type store, these will keep them away as well... They are one of nature's creatures, just need to find another place to live. Good luck