One exemplary embodiment of the present disclosure is directed to a vertical axis washing machine. The washing machine includes a cabinet having a top portion with a lid and side portions extending downwardly from the top portion. The lid has a first layer and a second layer that are separated by a volume of space defined by the first layer and the second layer. A tub is positioned within the cabinet with a basket rotatably supported within the tub. The washing machine also includes a heater and a water level sensor. The water level sensor controls the volume of water that enters the tub and the heater generates steam from such volume of water.