Apply a cleaning spray all over the inside hood of the grill.
Use a drill with a scrubber attachment on the area with the spray to clean off the surface.
Remove the upper racks of the grill and vacuum out any old char or debris.
Finish cleaning up the area from the previous step using soap and a Drill/Driver with a scrubbing accessory.
Lastly, clean up the lid for your grill by using a power scrubber and the cleaning spray from the first step.