Follow the owner's permitted surface-care method and keep liquid away from electrical parts, openings and connections. The casing is not a washable bucket.
What the observation means
Spraying or pouring water over it can reach unintended areas. A contaminated leak needs appropriate handling rather than an ordinary quick wipe.
A useful next step
Use only the specified cloth and compatible product under safe conditions. Do not pressure-wash, steam-clean or open the unit. If the casing is damaged or moisture has reached electrical equipment, stop use and arrange assessment before treating cleaning as the only task.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.