Air fryers will smoke a lot most commonly because of the grease build-up. When you consistently use your air fryer without washing it, excess grease will collect at the bottom. Consequently, when your air fryer is heated to high temperatures, the grease will burn and release the smoke. Additionally, food items that bear a high-fat content are also going to cause smoke. This is because the high heat of the air fryer will burn the fat. Always clean the oil pan and avoid food items with high-fat content if you can) to prevent smoking.