I had the exact same thing happened to me in the fall. I own a 2015 as well. Except I drove mine to the dealership and they contacted me the day later after doing some work on it that there was a mouse nest in the rear compartment-with baby mice in it!!! Once they realize there are mice in a vehicle the dealer can no longer drive the vehicle. So it was towed two hours away to a place that was specialized in mouse removal/cleaning. Thank goodness insurance covered it. Bill was $1400 with tow and cleaning. I talked to the cleaners if they knew where they got in- he had no idea. His advice is dryer sheets under the seats.