Final answer:
The charge nurse should initially explore further to identify the nature of the LPN's complaint about the UAP's untidiness and failure to restock supplies, ensuring an informed approach to resolving the issue.
Step-by-step explanation:
The best initial response by the charge nurse when an LPN complains about an unlicensed assistive person (UAP) leaving the work area untidy and not restocking supplies is to explore for further identification about the nature of the problem. This approach allows the charge nurse to gather more information and assess the situation accurately. Documenting the LPN's concerns and discussing them with the UAP can lead to direct and immediate improvement. If the problem persists, it might be addressed in a broader forum such as the next unit meeting or through formal procedures, depending on workplace policies.