We just had a mouse somehow get down our dryer vent tube from the attic of our home and die in the flex pipe behind the dryer. Clothes came out smelling like death.
I replaced the pipe, and then sprayed Febreze in their liberally and ran a couple of empty loads with no heat. Smell gone.
I would open up the bay, spray it down liberally with Febreeze, and then put a box fan in there and air it out.