Keep the timeline
State when the last programme finished and whether sink use or dishwasher inactivity preceded the water. Describe the level without tasting or handling it.
Inspect the actual routes
An engineer can assess the model and waste connection before deciding what work is appropriate. Avoid repeatedly emptying and refilling the machine as a diagnostic exercise.
A useful distinction
Water that appears after sink use can suggest a different route from water arriving during complete household inactivity. State the sequence as observed, while leaving the actual source to inspection.