Place a backflow incense cone at the top of the burner. Simply light the cone and watch as the incense smoke flows down and surrounds color-changing castle. How to Use a Backflow Incense Burner: 1. Carefully light the tip of your favorite backflow incense cone. Pro tip: Use tweezers to protect your hands. 2. Let the flame ignite the tip of the cone for a few seconds before you gently blow it out. 3. Once the cone is glowing, place it on top of the burner on a heat safe surface. Make sure the hole of the cone aligns with the metal hole on the backflow burner. 4. Enjoy the soothing aura of the incense waterfall!