What foul entity corrupts my living room?

A putrid stench hangs in the air. It is one of those annoying little 'faint odors' that are smelly enough to drive you nuts, and evasive enough to prevent you from determining the source. This one smells suspiciously of hotdog water, smelly foot, or perhaps a bologna sandwich left in your car on a hot day. Maybe I don't really want to know where it is coming from. The Gods only know what Bebe has stashed away in the crevices of the sofa or under the fish tank. At first I thought that one of the tanks denizens had gone to the great fish tank in the sky. THEN I thought that maybe Bebe stashed some snacks under the sofa. It wasn't smelly enough to be a forgotten diaper (Hubby is notorious for 'forgetting' to throw away a wet diaper). Perhaps it was the garbage breath from 'The Old One' (Kira).Is the smell emanating from the sofa cushions? The carpet? Hubbys shoes? Nope. It is driving me crazy and I can concentrate on NOTHING! BEHOLD! I am now the almighty wielder of odor eradicators! Behold the power of Febreeze and Lysol spray! *sighs* I hope I can find the source. There is only so much cover up can do.