It is recommended to clean the Ooni oven after each use. This will help ensure that your oven stays in good working condition and will help prevent any debris or grease from accumulating over time. Wipe down the inside of the oven with a damp cloth and remove any ash or debris, then wipe down the outside with a dry cloth to get rid of any grease or dirt. Additionally, periodically inspect all components for signs of damage or wear and tear so that you can replace them promptly if needed.