Use of the shampoo by children under 12 years of age is not recommended except on the advice of a doctor. Dry shampoo is probably the hair styling product most likely to strike fear into the heart of a woman. We ve all heard this spray can work wonders, giving your hair volume, getting rid of oil, and even allowing you to skip days between hair washings. Let s face it, that last reason is a technological wonder that all women love! But when you throw in the threat of looking like you ve used George Washington s hair powder, most women won t even look at a can of dry shampoo.