Utility Wonder 10-1010 Soot Away Soot Remover Stick 

Stick-form throw-in tube designed to remove soot safely and efficiently. It's fast, clean and easy to use. 

Do NOT Open Soot Away Stick. Run The Burner To Heat The Combustion Chamber To High Temperature. Drop Unopened Soot Away Stick Container Into Any Convenient Chamber Opening While The Burner Is Firing. Close All Doors And Ports Around The Chamber And Let The Burner Run For At Least 5 Minutes. Us 1 Soot Away Stick For Each 300 Square Feet Of Steam Radiation (Or Equivalent 72,000 BTU).