Humidity matters: On rainy or very humid days, shells may need extra resting time to dry. If shells crack, the oven may be too hot—use an oven thermometer and reduce temperature by 25°F if needed. If shells stick, they’re likely underbaked; bake 1–2 minutes longer next time and cool fully before peeling. Storage: Refrigerate in an airtight container up to 7 days; freeze up to 2 months.