Wash potatoes well and cut into wedges (see post above for step by step photos).
Place potato wedges in a large bowl and fill with very cold water. Let sit for at least 30 minutes. If you want to leave them longer, simply place the bowl in the fridge and let soak for several hours.
Drain potato wedges and dry well on a clean kitchen towel.
Preheat air fryer to 400 degrees F according to manufacturer's instructions.
Place potato wedges in dry bowl, drizzle with oil and sprinkle with seasoning salt and garlic powder. Toss to coat.
Place potatoes in air fryer basket and cook for 15-20 minutes, opening to stir and flip potatoes once or twice through the cook time. *NOTE: a single layer is best but not necessary. If you only have a single layer of potatoes, they may cook more quickly so keep an eye on them. The more full your basket is, the longer it will take to cook. Be gentle when you stir and don't do it too often as the wedges can break and crumble.