Well, using foil can sure be a fire hazard if you aren't careful where you put it... You've gotta make sure it doesn't float up and hit that heating element up top!! To do it right, just lay a small piece snugly right in the bottom of the basket or under your veggies, and always make sure your food is heavy enough to hold it down securely?? It makes cleanup a breeze, just watch out for the airflow!