The Auto CrispSeal Drawers use an auto humidity control to automatically control the humidity inside the drawer without the need for settings. Based on the model of your refrigerator, it may be equipped with an automatic humidity control membrane. If the humidity control membrane gets dirty, Frigidaire recommends washing it with soap and water and drying it thoroughly before replacing it. For more information regarding the Auto CrispSeal Drawers, refer to your Owner’s Manual.