I put all my parts in the steam bags. However, if you are using the soft shields, they can warp in the microwave, so wash them well with soap and water and boil occasionally. That is what the medical supply told me. DO NOT EVER put tubing in water (even though it says to) the water can get into it and cause condensation and moisture problems. I just wipe the outside down with the quick clean wipes occasionally. This is per the med supply company. Good luck and congratulations! You will LOVE the Freestyle! I sure love mine!