Place the disassembled breast pump parts in the dishwasher.
Be sure to put small items in a closed basket or mesh bag so that they do not disappear in the dishwasher filter.
Run the dishwasher with a drying cycle (or disinfection setting) of hot water and heating, which helps kill more bacteria.
After washing your hands with soap and water, remove the parts from the dishwasher.
If the item is not completely dry, place the item on a clean unused towel or clean paper towel, and then dry it thoroughly before storing.