A device and method that cleans microwave ovens through a chemical action, specifically to an agent that is placed into the microwave oven, and then activated by operating the oven for a period of time. Different embodiments include a device composed of an open cell container filled with solution; an open cell container with an attached sponge(s) and filled with solution; and a sponge that contains a cleaning solution in hydrant or dehydrated form. In some of the described embodiments, the device has a tear off membrane seal to maintain the solution within the cell prior to use. Another embodiment described has a bottle hanger attached to a cell. All embodiments maintain a process to absorb excess microwave energy.