Rinse with water after use and let dry. If used frequently, descaling can be carried out once a month. Place the Slow Cook Circulator into a container. Pour in water up to the maximum level. Set the temperature to 70°C and add 5g of food grade citric acid powder or lemon slices into every litre of water. Boil for 20 minutes. After that, rinse the heating part of the Slow Cook Circulator with cold water. Let it dry.