Keep the original packaging
State the product name and whether other products were used. Do not mix more chemicals or attempt a neutralising treatment inside the system.
Describe the actual fault
A smell, failure to start and slow discharge need different assessments. Give the model so appropriate care guidance and suitable inspection can be considered without assuming a chemical caused component damage.
A useful distinction
An earlier product may remain relevant if another cleaner was added afterwards. Retain the names and packaging where available, but do not attempt a chemical treatment based on an online explanation of the fault.