If you hung in a smoky lounge the night before or just didn't have time for a full-on wash, dry shampoo is the quickest solution for less-than-fresh strands. The powdery and oil-absorbing ingredients will help remedy muskiness. You can also clear up a dirty scalp without water using witch hazel on a cotton ball or Q-Tip. If you like the look of a little hair grease but want to mask the scent, try a hair fragrance. These are all great postgym remedies as well.