Having an abundance of food may not be the best thing when it comes to your refrigerator (or your freezer). To keep it running efficiently (and to keep the food cool), you need to leave some space in the fridge for air to circulate. Without it, your fridge will struggle to keep food cool enough, so food may spoil faster. Fill your shelves, but avoid overstacking. You should be able to comfortably reach the back of your refrigerator. If not, it’s time to purge some items.