What should be used to indicate a wet floor after cleaning?

Using a wet floor sign is critical for maintaining safety in a dining or service environment after cleaning. The sign serves as a clear visual warning to both employees and guests that the floor is wet and poses a slip hazard. This proactive measure helps to prevent accidents and injuries, ensuring that everyone is aware of the potential danger.

The other choices do not effectively communicate this hazard. Cleaning chemicals are not a visual safety indicator; they are used for cleaning rather than alerting others. Technician equipment, while necessary for cleaning tasks, also does not provide a warning about wet floors. Server assistance might help manage the dining area, but it does not serve the specific purpose of warning about wet surfaces. Therefore, the wet floor sign is the most appropriate solution for indicating a recently cleaned area.