Just took my SLK out after a long winter in the Northeast and apparently a field mouse used it as a winter home. The heater fan seems to be straining and the smell of a field mouse nest fills the cabin. There are a few small pieces of house insulation under the hood (some insulation that was stored in the garage has been nibbled). I suspect a nest was made inside the air hose leading to the heater. Does this sound plausible and if so can I clean it out?