Now, you might be wondering, what makes a McDonald's burger go bad in the first place? Well, it's all about bacteria growth and moisture levels. When you store a burger in the fridge, the bacteria on the patty and in the bun start to multiply, causing the burger to spoil.
But don't worry, there are ways to slow down this process and keep your burger fresh for longer. For example, you can store it in an airtight container to prevent moisture from getting in. You can also keep it at a consistent refrigerator temperature below 40°F (4°C) to slow down bacterial growth.
