Hello. We have a Ninja Air Fryer that has been a game changer for sure, but after 3 months I want to give it a deep clean. Plenty of tips out there about cleaning the buckets, and to be honest that is pretty easy. But what about the elements and the metal area housed in the top of the unit? These are starting to get quite discoloured, and there doesn’t seem to be any obvious or easy method of doing this. Any help tips or suggestions much appreciated. Thank you. X