Be sure you use an olive oil spray with NO Propellants and NO Additives. If you can not find a brand like this (I used Bertoli Brand), you can certainly use an extra light olive oil (about 1-2 tablespoons) to toss the soaked and dried potato chips to coat evenly. The propellants and additives from a standard can of cooking spray are not recommended for use in air fryers as the additives tend to leave an unwanted coating on the air fryer basket.