I'm a one person household so I don't have a lot of stuff in my fridge usually. I mean, I keep food in there, but not so much that I don't have a list in my head of what I have and how long it has been there approximately. My freezer is worse though. I always find dishes in there I'd totally forgotten about.

And cleaning? Um. maybe once every two months or so. When I'm in a cleaning mood (doesn't happen that often).