The answer depends on its surface. A coated griddle may be damaged by a tool that is acceptable on another material.
What the observation means
Cleaning advice for cast iron, enamel and non-stick surfaces is not interchangeable. A removable griddle also differs from the fixed cooker top beneath it.
A useful next step
Use the accessory's own care instructions and allow safe cooling. If the coating is flaking or the plate is distorted, stop using it and confirm replacement compatibility. Do not sand off the finish or apply an improvised coating to make it look new.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.