The Backflow Principle: because the density of smoke is heavier than the air density, smoke stream from the high down like a waterfall
How to Use
Choose a flat, windless place Lit up the top of the backflow cone, burn it fully in case you have to lit it again Place it on the incense burner, and wait a few minutes, the smog will slowly stream down, a dreamlike waterfall shows
Warm Tips:
After cones burned, it will leave yellow liquid and ash Wash it with water, Naturally dry would be great