An excessive or unsuitable additive can change the feel and fragrance of laundry, making the finish harder to judge. It does not establish that the drying system is faulty.
Understanding this situation
Measure the product according to its instructions and the drawer's maximum mark. The drying stage cannot correct an incorrect wash dose, and adding more fragrance is not a substitute for appropriate rinsing.
A useful next step
Review the wash products and drying target together. Describe visible residue or persistent foam separately from a damp finish. If the cycle has a warning or safety symptom, stop use rather than running repeated combined cycles to compensate for the product.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.