How to store car without rodent infestation?

I'm going to try the dryer sheets thing for good measure though I haven't seen any rodents in my garage yet.

I've had them in one of my sheds though... BTW, I found those Victor sonic rodent repellers to be a joke. The mice pretty much had a dance party right in front of them. So I put poison in front of the sonic things and they at least drew the mice to the poison. I returned them anyway. The neighbor's outdoor cat has been taking care of a lot of the mice now too.