Only use a documented programme or function suitable for the towel and appliance. A normal drying cycle is not automatically the appropriate way to heat already-dry items.
Understanding this situation
Sensor programmes may behave differently with little moisture, and excessive treatment can be unnecessary. A warmer result is not a reason to ignore capacity, fabric or safety instructions.
A useful next step
Check the manual for the intended task and keep use attended. Do not leave towels heating repeatedly or tightly piled while hot. If the appliance produces abnormal heat or a burning smell, stop rather than treating the warmth as useful.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.