Abstract: A method and apparatus for cleaning grill range units and for removing accumulated grease and other obstacles blocking the grease-carrying conduits in their grease collection systems is provided for cooktops including a grill, a drip pan for collecting grease, a drain opening in the drip pan and a conduit leading from the drain opening to a grease collector. A method of cleaning a cooktop comprises the steps of providing a long semi-rigid but flexible drain cleaner having a length at least about equal to the length of, and a diameter smaller than the diameter of said conduit and inserting the drain cleaner into the drain opening and pushing the drain cleaner through the conduit to remove collected materials therefrom. In preferred methods and apparatus the drain cleaner can have a low thermal conductivity. For example, the drain cleaner can comprise a thermoplastic material such as a nylon rod which is both thermally and electrically insulating.