Similarly, it’s best to avoid dehydrating foods in the air fryer unless you have a heat-safe trivet handy to keep your ingredients from blowing around, as this will cause them to lose moisture and become super lightweight. Dry spices, too, will go flying if they're not adhered to your chicken with cooking oil, and even the top slice of bread on your grilled cheese could come loose if not skewered with a toothpick (or at least a good slathering of mayo).