We recommend hand washing our breast pump parts instead of putting them in the dishwasher as some dishwasher detergents may leave a residue or have additives that could be harmful to infants. If you choose to wash them in a dishwasher please make sure to use a dishwasher basket for small parts to keep them secure during the wash. Always keep in mind that certain parts of our breast pump may require more careful cleaning, such as valves and diaphragm therefore try to regularly inspect and replace any parts that show signs of wear or damage.