Fill a medium-sized bowl with 3-4 cups of water and set aside.
Wash, Peel, and slice the sweet potato into equal sized strips.
Place all of the strips of sweet potatoes into the bowl filled with water.
Set this bowl aside with the sliced sweet potato fries for at least 30 minutes and they can actually remain up to 8 hours.
WHEN YOU ARE READY TO AIR FRY THE SWEET POTATO FRIES ...
Drain the sweet potato fry slices from the water and pat dry with a paper towel.
Preheat the air fryer for to 400° (yours may have the pre-programmed french fry button, use that)
While the air fryer is preheating, you can either ~brush the sweet potato fries with oil and sprinkle with salt or ~you can brush them with oil and brush them with salt per batch when you place them in the air fryer.
Transfer the sweet potatoe fries into air fryer basket.
Program air fryer for French Fry Cycle, 400° 15 minutes.
Remove and serve warm.