I have been using Fresh Cab in the engine compartment of the car that is home. Before that, we would come home to find wires chewed or the gas line chewed. So far (knock on wood) a few Fresh Cab pouches have worked. I also put them in the motorhome in the winter to keep the varmints out. Beware - they are smelly but I don't find them to be a problem as long as I am not living in the motorhome when they are put around. (under the refrig, under drawers, in compartments...) I get it from Amazon.