I layed on the passenger floor , used a small straw like attachment to vacuum inside the clam like cage opening , you must hold open the door (clam shell) with something , I used two screw drivers . You can then see the nest and work it out , it’s a PITA . But you will be successful , otherwise you must remove the dash for motor access , I’ll pass on that .
You could also pull out the cabin filter and try that route too! I left my car at Army for 3wks. Mice FOUND my sunflower seeds and hosted a rave in my car. A shop vacuum, cussing and some surgery I got it ALL out!