Yesterday, the electricity was out for a while and I guess some of the fish in my freezer warmed up and juices started flowing out of its bag and into the vent. Now there is a fishy scent creeping up from the back of the fridge. Is this something I can just wait out or should I do something about it? I did clean out the freezer and everything looks immaculate in there now.
Look for a tray or pan that catches condensation beneath the fridge. It should just slide out. Try cleaning that.
Newspaper and kraft paper help absorb odors, so you can find some places to line with a folded newspaper or brown paper bag. Some layers under the ice cube tray and on the bottom of the freezer.
Baking soda also works, in an open container or just a whole open box.
If none of that does the trick ... I once fumigated a roach infested apartment with the refrigerator door open. Long story, but it seemed like a good idea at the time. The fridge was empty, unplugged, and full of roaches. My skin crawls just remembering that apartment. The net result was that the fridge smelled like roach spray. I had to run it with the door open for several days, empty, pouring cool air into the room, before the smell finally disappeared.
In one of my units I had a smelly freezer. Cleaning all the surfaces didn't seem to help. I had to unscrew the plastic lining on the bottom of it and there was some disgusting ooze underneath. Probably from some meat juices that leaked there.
So keep looking or a spot where spoiled juices might have leaked