Poo vs No Poo

We've all been there, right? Slept through the 6am alarm, you've got twenty minutes to get dressed and leave for work, but your hair is a greasy mess oily enough to fry eggs on. You reach for the dry shampoo but it's empty. So, in a panic, out comes the hairband and your icky locks are either braided or strung up in a bun or ponytail. Disaster more or less averted.