Clean works like a sponge absorbing any cutting oil, grease, sludge or organic algae, which sits on top of the boiler water and prevents it from boiling and causing violent shaking of a boiler system.. Advantages: Non-toxic, safe Works while boiler operates Environmentally SafeRemoves Grease And OilEliminates ScaleNo Blow Off Or DrainingWill Not Swell SealsCompletely NaturalProvides dry steam Easy to useImproves heat transfer Eliminates pipe noises and gives more uniform radiation Can be used...