When I hang out at the Vacuums & More store, I watch what they do to learn as much as I can. When they work on any vacuum just before they are finished with it they use this spray on the cloth bag, spray and wipe dry the bag chamber or spray it on a throw rug and run the vacuum over it.

Its called "Majestic Carpet Solutions Triple action Multi-Enzyme spotter deoderizer protector." Removes spots and stains on almost anything. It contains DuPont Zonyl-spot and stain protector. And it smells good too, clean and fresh.

I have taken it and put it on a rag, wiped down the dirt chamber in an electrolux then left the rag in it, leave the chamber open and turn on the Electrolux, pushing the bag button on the back of the lid. It makes the vacuum smell clean!  It gets rid of pet oders in a vacuum. 

Its expensive, but this bottle so far has lasted me a year. It doesn't take much of it.  Plus its good on carpet stains and odors!