The prep work in making these air fried zucchini chips is what keeps them super crispy. By pressing the extra moisture out of the slices before breading them, you'll keep them from getting soggy. Liberally spraying the coating with olive oil (I use my Misto) and allowing the chips to sit for 2-3 minutes before air frying allows the oil to soak into the panko. Well-sprayed panko helps mimic the texture of deep-fried breading. Preheating the air fryer also allows them to start cooking immediately which helps give you the crunchiest breading.