This must-have dry shampoo magically makes greasy hair feel clean and refreshed. The best thing about this dry shampoo is that you can also use it to create voluminous styles, as it has hair-boosting properties, too. Great for any hair length and texture. Top Tip: give the product a chance to work into your hair and really absorb the oil at your roots by letting it sit for a couple of minutes before you massage it in and brush or comb it through. Spray 10-12 inches from the hair, focusing on the roots.