The present invention relates to a method for cleaning a commercial cooking device (100, 100′), in which a container (B, B′) with a solid cleaning agent (1R), in particular a firm gel, is accommodated in a connection unit (101, 102) of the commercial cooking device (100, 100′), and in which the solid cleaning agent (1R) is liquefied in the cleaning process in the container (B, B′) by means of heat and/or a solvent, preferably water and/or steam, in order to generate a liquefied cleaning agent. In addition, the invention relates to the use of a container (B, B′) with a solid cleaning agent (1R) for cleaning a commercial cooking device (100, 100′). Finally, the present invention relates to a corresponding container (B, B′) with a solid cleaning agent (1R) for cleaning commercial cooking devices.