Consider the programme, food and exact location. Condensation from moist cooking is different from liquid arriving from the hob or entering a concealed area.
What the observation means
A cool collecting surface can retain droplets, but persistent water outside the intended compartment needs attention. Do not assume all liquid below a grill came from the food above it.
A useful next step
Once safely cool, follow permitted cleaning and drying instructions. Record whether moisture appears only after a particular cooking method or even when the grill is unused. Avoid removing fixed panels to trace it or heating the cooker to conceal the evidence.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.