Packing the fridge solid (and trusting the door with the milk)

The fridge does not cool food by contact; it cools a circulating stream of air. Pack the shelves solid and that stream cannot move, leaving warm pockets in the middle of the pile and a compressor working overtime against a blocked path.

Why it backfires

Overpacking raises the whole cabinet's temperature toward the danger zone where spoilage speeds up — the food is not as cold as the dial promises. The door, opened constantly, swings warmest of all, which is why milk and eggs stored there spoil faster than their dates suggest. And a full fridge hides leftovers behind new shopping, which is how food waste compounds week over week.

The fix

Aim for roughly three-quarters full: enough thermal mass to hold the cold, enough space for air to move. Keep raw meat on the bottom shelf (so nothing drips onto ready-to-eat food), dairy and cooked food on the middle shelves, produce in its drawer with room around it. Move the milk to the back of a shelf — the door is for condiments and anything preserved enough not to mind the swings. If the fridge struggles even when sensibly loaded, that is a maintenance question: our five-checks guide covers seals, coils and settings in order.

Keep it from happening

A fridge thermometer ends the guessing (at or below about 4°C / 40°F on the shelf), a five-minute monthly clear-out stops the archaeology, and the appliance guides on this desk all share one principle: the machine's design assumptions — airflow, drainage, seals — are the maintenance schedule in disguise.