A new product, concentration or dose can coincide with changed residue, fragrance or cleaning. The timing helps describe the pattern without proving that the product caused it.
Understanding this situation
Keep any rinse-aid, salt-setting or programme changes separate in the account. If several things changed together, say so rather than making a confident diagnosis from the final appearance.
A useful next step
Follow the current product and model instructions. Do not keep adding extra chemicals to compensate. If suitable loads remain poorly washed or the machine reports a fault, provide the product details alongside the observed programme behaviour.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.