A spill outside the dispenser is different from the controlled amount intended for use. It can change foaming or leave product where it was not meant to be.
Understanding this situation
Do not assume the dishwasher will manage any quantity automatically. The exact model and product instructions should guide how the surface is cleaned before a programme.
A useful next step
Use an appropriate cloth or specified method and avoid mixing chemicals. Refit the dispenser cap or lid correctly. If an excessive spill or wrong product has occurred, seek advice before use rather than trying a hot cycle to remove it.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.