Compare a familiar recipe
A familiar dish on the usual shelf is more useful than several unrelated cooking results. Include preheating, selected mode and whether the difference is left-to-right or top-to-bottom.
Explain changes before the result
New trays, foil covering, a changed door seal or recent appliance movement deserve mention. An engineer can assess the pattern against the model's heating design; no promised temperature accuracy follows from the symptom alone.
