Door gaskets or seals refer to the flexible strips of rubber running along the sides of refrigerator doors. These components are crucial as they ensure an air-tight seal once the door is shut to prevent warm air from entering and cold air from escaping the unit.  Needless to say, Galanz fridge doors that fail to shut securely should be replaced. However, before doing so, you must check whether the door seals are unable to perform their functions as they are damaged or just dirty.  So, once you have thoroughly cleaned the parts, test the gasket by placing a dollar bill halfway in the fridge door and shutting it. If the bill slides or slips down, you should replace the seal.