We recommending cleaning your Keddle with vinegar a few times per week. Add 1oz of vinegar and 1oz of water to your Keddle and tip the Keddle upside down with the lid on for 5 minutes. After 5 minutes, wash the Keddle with soap and water. Hand wash ONLY with soap and water. Never submerge your Keddle in water. Never put your Keddle in the dishwasher. Do not clean your Keddle while running a warming cycle. Disconnect the charger prior to cleaning. Your Keddle is IPX5 water resistant which means that you can hand wash your Keddle with a low-pressure stream of water. Always dry the USB port prior to charging your Keddle. It is recommended that you wash your Keddle daily when warming water only or after each warming cycle for any other liquids. It is recommended that you hand dry, or air dry the interior of your Keddle before attaching the Keddle lid. If you need to clean your Keddle on-the-go and you do not have access to soap and water, we recommend that you use an approved cleaning wipe such as the Medela quick clean wipes. We also recommend that you clean your Keddle lid whenever possible. Medela is a trademark of its respective owners.