Given that it will be close to $1000 to deal with mouse chewing in the Crosstrek I decided to buy a Mouseblocker Pro. Its an ultrasonic device. I have a few of those plug in ultrasonic devices in my house and not sure they do much.
But this is for 12V for a car. It has 3 power levels.
I connected it to a jump battery pack I have while watching TV. In the low mode my daughter said it hurt her ears, worse in medium and at high I could hear it. Daughter could not take the sound.
The difference (between this and the ones for your house) is this is designed to go on when the car is off (and assume no one in the car) so this can really be powerful. Do not need to worry about it effecting people or pets.
So blast away and scatter the mouses.
I have also use a dropper to put some drops of peppermint oil on cabin air filter.
But this is for 12V for a car. It has 3 power levels.
I connected it to a jump battery pack I have while watching TV. In the low mode my daughter said it hurt her ears, worse in medium and at high I could hear it. Daughter could not take the sound.
The difference (between this and the ones for your house) is this is designed to go on when the car is off (and assume no one in the car) so this can really be powerful. Do not need to worry about it effecting people or pets.
So blast away and scatter the mouses.
I have also use a dropper to put some drops of peppermint oil on cabin air filter.