We don't turn off the fridge when we're cleaning it because our shelves and bins are removable. So we remove them and close the fridge door. If the shelves and bins in your fridge aren't removable, you'll want to consider turning off the power to the fridge (you can unplug it if you can get behind the fridge or turn it off via a circuit breaker). That way, you won't waste electricity by leaving the door open while you're cleaning.