11 months ago - I do this every January when it’s cold outside so my items can sit outside in laundry baskets as I deep clean. It does take me awhile to do since I strip the fridge of everything to clean every surface - walls, shelves, doors, drawers in the sink with soap & water, shelves in the doors are washed with soap and water - it’s a process. I’m not sure how long it takes, I’ve never timed it, but I do know it takes over an hour.
If messes happen throughout the year, then I clean that up then.