There are times when taking a shower just isn't an option. Whether you slept through your alarm, hit the gym on your lunch break, or caught a red-eye straight to the office, you'll need a quick fix to make yourself presentable. Particularly in situations that involve traveling or camping, hair can get dull, dirty, or greasy without a routine washing. With dry shampoo to the rescue, you can revive your tresses in no time.

Dry shampoo is a powdery concoction of substances that absorb excess oils in your hair from root to tip. Though it doesn't entirely eliminte build-up from styling products, dry shampoo is a quick and easy way to freshen up your hair when a shower is unavailable or unfeasible, such as after surgery. In addition to getting rid of the grease effect, some dry shampoos add fragrance, volume, and shine.

Whenever my scalp needs some TLC, I use Oscar Blandi Pronto Dry Shampoo, which cleanses hair with natural rice, oat, and tapioca starches and treats dandruff with triclosan and tea tree oil. What follows is a list of how-to steps for applying dry shampoo in a squeeze, a stroke, and a snap. Included are two options for putting the powder in your hair, though the process for aerosol dry shampoos will differ slightly.

  1. Shake the contents of your dry shampoo to dislodge any clumps.

  2. Option 1: Squeeze about a tablespoon of powder into palm.

  3. Stand over a sink to avoid messy clean-up.

  4. Rub palms together to spread out powder evenly.

  5. Run powdered palms through hair, starting at the roots.

  6. Option 2: Place applicator tip directly on scalp.

  7. Lift a section of greasy hair and squeeze powder on roots.

  8. Continue touching up all areas of hair that appear dirty.

  9. Run hands through hair until powder has completely dissolved.

  10. Massage scalp thoroughly, and use a brush to distribute powder throughout length of hair.

  11. Scrunch hair at the roots for extra volume.

  12. Flip head up to reveal cleaner, healthier-looking hair.