This Puckator Thai Buddha Temple backflow incense burner flows mist down through a backflow burner and creates a mist around the product. 

When backflow incense burns incense cones the mist it creates can leave a light residue on the burner and the surface the burner is placed on.  This is from natural oils and resins within the incense and can be wiped clean with a damp cloth.  Never leave burning incense unattended. 

The burner must be placed on a heatproof surface before use.