Preheat the air fryer for 5 minutes at 375°F (190°C).
Spray the air fryer basket with some vegetable oil.
Place the meatballs in the air fryer basket for 8 minutes, shaking and rotating them every 4 minutes or so. (Don't overcrowd the basket, lay the meatballs in a single layer).
Open the air fryer to see if they are cooked enough for you, and heat them for a couple more minutes if you wish.