Go to Amazon and look up electric rat repellers. Find the ones with 5 gold star ratings, and buy three different ones. I figure each one will have a slightly different sound level.
Aim them at the car and it will be bye by to these rodents.
I did this for my Nissan a year ago, I had rats chewing on the wires, and building nests on top of the damn battery. Since I installed my Amazon repellers the rats have been gone.
Squrrel = Rat, with a furry tail.
