Final answer:
A spatula should be used to spread soft wax on legs for an even and hygienic application.
Step-by-step explanation:
According to the textbook, a spatula should be used to spread soft wax on legs. The spatula allows for an even and hygienic application of the wax on the skin surface. It is important to use the correct tools in such procedures to avoid irritation, uneven application, and potential infection risks.