How does humidity affect styling products?

Humidity affects styling products primarily by introducing moisture into the air, which can alter the way these products interact with the hair. When the environment is humid, the excess moisture can cause styling products to lose their intended effectiveness. For example, hairspray may not hold a style as well, and products designed to provide texture or volume may become weighed down.

Additionally, the presence of humidity can lead to frizz and disrupt the smooth styles that certain products aim to create. Therefore, the correct answer points out that humidity can indeed reduce the longevity of styling products by interfering with their hold and overall performance.

While humidity might enhance the fragrance of some products due to increased vaporization, or modify how products feel and behave, these effects do not represent the primary and most impactful issue stylists face in a humid environment. The thickening of a product's consistency is also not a direct effect of humidity; rather, it refers to a different aspect of product formulation.