I have always used catigo whatever they have available at the grocery store to spray down the couch, and any other cloth not washable. I put all the laundry, bedding anything washable in huge trash bags AND SEAL them until they can be washed in hot hot water and heat dried. vacuum as much as...
genetic testing will tell you.
Folded ears is a genetic mutation. They can unfold there ears when they are hot, or nervous. however they are physically holding them up. There ears will relax to a folded state when the cat settles.