How to use: Light the incense stick for a while, keeping its tip on fire until it lights, and then blow out the flame. Backflow cones are available at the base, which are almost at the top of the cone. Place the lighted cone on the fireplace with the effect of reverse flow, so as to open the incense, to open on the opening of the fireplace with reverse flow. base of the cone. Each fireplace with a backflow effect has a different way in which smoke is to flow in terms of incense size. Do not place the fireplace in a draft, because it will interfere with the way smoke is released and the appearance of the cascade being created.