Sweet potatoes are best stored in a cool, dark place in the pantry. The pantry is usually the coldest part of the house, so this is an ideal place for storing any type of potato. Keeping them in this area will prevent them from spoiling prematurely. A popular myth is that sweet potatoes should be stored with apples to keep them fresh, but this is not optimal because apples emit ethylene gas which causes other fruits and vegetables to spoil. Another way to store a sweet potato is by keeping it in the refrigerator. It should be stored right next to potatoes, onions, and garlic. The potato can be washed before storage and wrapped in plastic wrap. If you want to cook the sweet potato without peeling it, then just place it on a wire rack on top of a rimmed baking sheet so that any excess moisture drips off while cooking.