UV sterilisers are commonly used to disinfect breast pump parts as UV light can kill bacteria, viruses, and other microorganisms Keep in mind that while UV is effective it may not eliminate all types of contaminants therefore make sure you regularly clean and maintain your UV steriliser. It is essential to follow the manufacturer's instructions for the UV steriliser to ensure proper usage and effectiveness. Please be aware that UV can break down the chemical bond in the plastic which can cause a change in appearance and deterioration of the material. You may find that there is a chalky appearance or discolouration (yellowing/whitening) of the material. A UV steriliser may also end up reducing the lifespan of your silicone parts as they can become sticky and unusable over time.