Kitchen exhaust cleaning is also known as hood cleaning, and it involves all accumulated grease from inside every duct, hood, fan and vent of every commercial kitchen’s exhaust system. Too much accumulated grease in any kitchen’s exhaust system is another potential fire hazard. The cleaning process involves caustics, pressure washing with the hottest water and finishing. It begins with breaking down the grease through approved caustic chemicals, through which the cleaning and removal may flow without interruption. Machines boil water at extremely hot temperatures and apply it to further the spread; certified cleaners then inspect and approve all aspects, adding the finishing touch.