Remove the dirt container from the base of the vacuum by pressing the release button that is located on top of the dirt container lid; the container will pull straight out.
Hold the dirt container upright over a trashcan. Press the release button, which is located toward the bottom of the dirt container. The bottom will open and the collected contents will drop out.
Allow all of the dirt and dust to empty before closing the container. The door will click when shut properly. Place the dirt container back into the Hoover Cyclonic base.