Large Dog Pet Beds How To Protect Sofa From Pet Smells?

How to protect sofa from pet smells? - large dog pet beds

We have a kind of fabric sofa. We have 2 dogs. You will sleep so long as they can! It is a shock. Laboratory so that a larger dog. She gets the couch with the smell!
My plan is to be cleaned a carpet cleaner in their power.
How can you protect against odors? I thought of a plastic material and get the seat surface is covered with a soft cloth so that the use of PET-beds. Delete I get a visitor.
What can I protect? What should I do?

Oh, and the maintenance of dog bed is a no-no. We have 2 sofas and a "good" is the one I bought before our wedding. My husband wants the dog refuses anything other than the bed would still off. Sofa-LOCK is something that we do not.

We can add a new sofa in a year, or buy 2, but now I have clean bed !!!!!!! Its so stinky! (Neat Freak here:))