Most exhaust duct grease buildup in Connecticut kitchens happens out of sight. Your hood can look spotless on Friday night, yet the duct behind it may be carrying a week or more of residue by the following Tuesday. Grease vapor from the cooking line does not stop at the filters. It rises into cooler metal, condenses, and builds in layers between every service and every scheduled cleaning. That hidden layer is the part most likely to start a fire, and it is the part nobody che