Only use accessories that are compatible and do not interfere with normal control movement, ventilation or the ability to switch off promptly.
What the observation means
A cover can obscure markings or prevent a push-and-turn control operating as designed. It is not a replacement for supervision or the appliance's own safety guidance.
A useful next step
Check the cooker and accessory instructions before fitting. If the control no longer returns reliably or its Off position is unclear, remove the unsuitable arrangement safely and seek advice. Do not alter the knob or valve to accommodate a generic child-safety accessory.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.