How do you clean it? Does it have to be oiled?

Hi, thanks for your enquiry. The manufacturer gives the following guidance for cleaning/oiling the cooking plate : If you are not using a cover, we recommend oiling your Dragonfly cooking plate once every 7 to 10 days. After you use your Dragonfly, the leftover ashes must be removed to prevent the fire bowl's air vent from clogging. Please note that the ashes will stay hot for a very long time; therefore, make sure to only store leftover ashes in fireproof containers, such as zinc buckets. Once the ashes have cooled, they can be removed with a dustpan and brush and deposited into a regular waste bin.