How long must a clothes dryer run on medium heat to kill fleas?

To effectively kill fleas, a clothes dryer should run on medium heat for at least 30 minutes. The heat needs to reach a temperature of around 130°F (54°C) to ensure that fleas, including their eggs and larvae, are eliminated. It's important to use this duration to ensure thorough treatment, especially for infested items like bedding or pet blankets.