Less: Psssssst Instant Spray Shampoo ($6.18, drugstore.com)
Luxe: Oscar Blandi Pronto Dry Shampoo ($19, sephora.com)

Ingredients in Action
Powder in the thrifty brand absorbs excess oil, as do rice and oat starch in the costlier spray.

And the Winner Is …
Both products will clean and add volume to a heavy, oily mop, but what about the less-than-fresh scent of dirty hair? The pricier "shampoo" has a crisp, lemon-y scent to mask any odor.