The accessory is designed to manage liquid and fat in a particular way. Blocking a channel or overfilling a collection area changes that arrangement.
What the observation means
Food residue, foil and an incorrectly positioned plate can interfere with drainage. Hot fat should not be directed towards burner controls or improvised containers.
A useful next step
Check the approved placement before cooking and clean accessible parts as instructed after cooling. If fat has entered controls or concealed spaces, stop use and seek assessment. Do not tip a hot loaded griddle to clear a blockage while it remains over a heat source.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.