Final answer:
The portion of the head contacting the hairpiece must be clean and dry to ensure proper adherence and avoid skin irritations.
Step-by-step explanation:
During the trying on of a manufactured hairpiece, the portion of the head which comes in contact with the hairpiece must be clean and dry.
It's important to ensure that the scalp is free from oils, dirt, and sweat to help the hairpiece adhere properly and avoid any discomfort or skin irritations.
Applying the hairpiece on a clean and dry portion of the head will also help with the longevity of the adhesive or clips used to secure it.