The appliance is designed for permitted laundry products and textiles, not for flushing solvents, concentrated cleaners or unknown substances through a heated cycle.
Understanding this situation
Chemicals can affect materials, produce fumes or remain in fabrics that later enter drying. A long wash or extra rinse does not establish that an unsuitable substance has become harmless.
A useful next step
Follow the chemical supplier's handling and disposal directions. If contamination has already entered the machine, disclose it before service and do not add another cleaner to neutralise it. Avoid starting a drying stage on affected items without appropriate guidance.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.