Only use products specifically permitted by the appliance instructions, and remove them as directed before cooking. A pleasant smell does not establish food or heat suitability.
What the observation means
Residues can change when heated and may contact food or sensitive surfaces. Household air fresheners and perfume products are not oven accessories. Persistent odour also needs its cause understood, especially if it is electrical, chemical or associated with visible damage.
A useful next step
Remove unrelated items when the oven is safely cool and follow approved cleaning guidance. If an unknown product has been heated, retain its label and seek appropriate advice. Do not mask a recurring smell with another chemical or a stronger cooking fragrance.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.