What precaution should be taken when applying powders?

The appropriate precaution when applying powders is to ensure that none are inhaled. Powders can create an aerosol effect when applied, which can lead to respiratory issues if inhaled into the lungs. This is particularly important for individuals with respiratory conditions or sensitivities, as inhaling powders can exacerbate these issues.

In contrast, while avoiding contact with the eyes is certainly important when dealing with any substance, it does not encompass the specific respiratory risks associated with powders. Applying generously does not address safety and could potentially lead to excess powder that might create a greater risk of inhalation. Lastly, the instruction not to use any powders if wet pertains more to the effectiveness of the powder rather than a safety concern related to inhalation. Therefore, focusing on preventing inhalation is essential when applying powders.