Turns out, my husband's "just wash it" response wasn't as terrible as it sounded on the surface. You shouldn't depend on dry shampoo to keep your hair looking clean and fresh. Just use it in a pinch or to extend your style a few times per month. Dry shampoo (and most alternatives) won't moisturize your hair or scalp the way a full shampoo and conditioner routine will, and it will leave a residue that won't actually cleanse the bacteria, yeast, and other product residues.