How to use waterfall incense?
First, light the tip of the backflow incense cone, and allow the top to get glowing hot (allow 4 - 8 seconds of burning before blowing out flame).
Next, blow out the flame and allow the fragrance to release.
Finally place the cone on top of the waterfall burner directly above the hole. It will take about about 1 minute for the backflow smoke effect to start.