Wearable Breast Pump,Hands Free Breast Pump,Breast Pump,LED Display,Low Noise &Painless Breastfeeding,3 Modes & 9 Levels,Electric Breast Pump,2Pack Silicons should be sterilized before used. You can use boiling water to wash silicon parts.(Silicons canwithstand temperatures up to 248°F.Note: Do not use brushes or sharp tools to clean duckbill or anysilicons parts to avoid damage) Insert the valve intothe silicone connector.Insert the silicone shield into the collector cup and make sure it is in right position. Assemble the suction bowl into the milk collector cup. Rotate the pump in clockwise direction and install it. Installation Precautions Note: Failure to install the product in a standard way will lead to problems such as milk leakageand lack of suction, please ensure that the product is installed correctly.