To maintain the freshness of citrus fruits, it's essential to store them properly. Store them at room temperature if you plan to consume them within a few days. However, if you want to extend their shelf life, store them in the refrigerator. Make sure to keep them in a ventilated container or a perforated plastic bag to prevent moisture buildup, which can lead to mold growth. Avoid storing citrus fruits near foods with strong odors, as they can absorb these odors easily.