Helps to quickly remove bees from honey supers.
Apply bee deterrent (Bee Repel, Fisher's Bee Quick, etc.) to the felt underside of the fume board in the shape of an "X" or "S". Place fume board on top of the upper super with corners of frames exposed for airflow. Sunshine on the corrugated plastic top works to raise the temperature by several degrees which helps make it more effective.
Fisher's Bee Quick sold separately.