Final answer:
After treating for bedbugs, the customer should stay out of the room for 4 hours and consider setting traps to monitor the situation. Regular cleaning can help prevent re-infestation.
Step-by-step explanation:
After treating for bedbugs, it is important to advise the customer to stay out of the room for 4 hours. This will allow the product to take effect and ensure their safety. Setting traps may also be a helpful approach to monitor the situation and prevent re-infestation. It is not necessary to maintain a perfectly clean room for a week, but regular cleaning can help eliminate potential untreated harborages.