To ensure that your sweet potatoes come out of the air fryer with crispy outer edges while soft and fluffy on the inside, make sure that you don’t overcrowd the air fryer basket. There needs to be enough space between the potatoes to allow good air circulation for the potatoes to crisp up beautifully.  It’s also important that you toss the potatoes mid-cook so that all sides are given the chance to get super crispy.