A tool can enlarge or damage an opening and alter the intended flame pattern. Owner cleaning must stay within the exact instructions.
What the observation means
Visible residue does not prove that it is the cause of a fault. Jets and internal gas parts are not owner-cleaning targets.
A useful next step
Use only the permitted method on designated removable components while cool and safely off. If normal operation remains uncertain, seek assessment. Do not drill, file or force wire through ports, and do not repeatedly light the burner after an improvised modification.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.