Pat your chicken skins dry with some kitchen/paper towels, to get remove any extra moisture. And put them in a large container or bowl.
Then add the garlic, ginger, soy sauce and hoisin sauce and combine well. Making sure all the meat is covered in the marinade. Cover and leave for at least 30 minutes or as long as possible - even overnight.
Five minutes before cooking, preheat the air fryer at 200°c (400°F).
Once ready, add the chicken thighs to the air fryer basket, skin side up and making sure they're on a single layer.
Air fry for 20-25 minutes at 180°c (360°F), making sure to check on the chicken around 10 minutes in, just to make sure the skin isn't burning.
Once, cooked, slice and serve with steamed rice and sprinkle with spring onions.