Is it safe to dry items that have been exposed to cooking oils or gasoline?

No — you must not dry articles that have been cleaned in, soaked in, or spotted with gasoline, dry-cleaning solvents, or other flammable substances, as they give off vapors that could ignite or explode. Items contaminated with cooking oils should also not be placed in the dryer, as they may contribute to a chemical reaction that could cause a load to catch fire. (Page 3)