Air fryers are handy, but there are certain foods and tools you should avoid, as they can damage them or make a big mess in your kitchen. Light and small items, such as leafy greens, popcorn, and dried pasta, can stick to the heating element, potentially causing damage. Similarly, foods that release a lot of steam or smoke, such as fatty cuts of meat, can produce smoke that damages the electrical components. Bulky items, like whole chickens, can also touch the heating element and cause damage. Plastic should never be used in the air fryer, as it can melt and contaminate the food. Improperly positioned aluminum foil and baking paper can block air circulation or come into contact with the heating element, affecting the cooking results. Silicone, ceramic, metal and glass utensils are safe, as long as they are suitable for high temperatures. To prolong the life of your air fryer, always read the appliance's manual, maintain the non-stick coating and follow the cleaning recommendations.