Stop using the appliance and avoid touching a damaged or excessively hot connection. A smell at the plug or socket is an electrical issue requiring assessment, not a detergent or programme problem.
Understanding this situation
If safe access is possible, isolate the supply without handling wet or damaged equipment. Smoke or fire requires emergency action rather than further inspection. Do not move the plug to another socket as a trial and continue the wash.
A useful next step
Arrange appropriate electrical and appliance advice, explaining where the heat or smell was noticed. Keep the machine unused until the affected connection and cause are assessed. Do not fit a larger fuse or keep resetting protection to complete the laundry.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.