The lid of the rice cooker you mentioned can be opened, that is, the white silicone in the middle, hold the aluminum sheet on the inner side with your hand and pull it down, wipe it with a cleaning cloth dipped in detergent, and finally rinse it thoroughly with water, because detergent has odor at high temperature, affecting the taste of your rice and your health. Some rice cooker lid is not removable, that is because there is a silicone gasket around the aluminum sheet and between the plastic, it can also be cleaned by the above method.