The basket occasionally went in the dishwasher which cleaned the surface, but the well gunked grease has been building up.
Tried soaking the basket in soap and hot water. Scrubbing with a soft sponge. And then running the dishwasher multiple times but it only got a small part of the grease out.
I preheat the air fryer to soften the fat and oils. Drain whatever I can into a container, and use a silicone spatula to get anything that is still adhered.
It then goes in the dish washer on a hot wash. Come out like new.