Add the coke, ketchup, sugar, soy sauce, lime, mustard powder, paprika and garlic powder into a saucepan. Bring to the boil and cook for 3-5 minutes until the sauce thickens to almost the consistency of ketchup.
Preheat the air fryer to 375F / 190C, pat the chicken wings dry, add half into the air fryer basket and cook for 9 minutes, turning them halfway through. Then remove and repeat with the remaining wings.
Coat the partly-cooked wings with the sauce, add half of them back into the air fryer basket, and cook for 9-12 minutes, until cooked through.
Repeat with the remaining wings. Then serve and enjoy.