How do you properly sterilize jars in an air fryer?

The best way is to place the jars upside down on the air fryer grill and heat them at 160-180 degrees for 10-15 minutes, depending on the size. You can sterilize the lids separately or together with the jars, but if they have rubber seals, it's better to do them separately so you don't damage the gasket. From my experience, this method is more than enough for canning - the jars are ready as soon as they cool down, no need to mess around with boiling.