DIY: "Dry" Shampoo Spray for when you don't have time to wash your hair - you need: 1 tbsp of cornstarch 4 tbsp of water 1 tbsp of rubbing alcohol, small measuring cup, small spray bottle. Mix it all together, pour it into your spray bottle & shake! To Use: Spray in on your scalp, in your hair and anywhere the your hair needs to be de-greased. You do not need to drench your scalp, just dampen it up. Run a comb or your fingers through your hair to distribute it evenly. Repeat if necessary.