DIY Moisturizing Leave-in Spray for Natural Hair Going down the natural hair aisle at the beauty supply store can sometimes give us a real headache when we see the prices. Does natural hair products need to be this expensive? Does it have to be this hard to find a good moisturizing leave-in spray without breaking my pocket? The answer is no. You can make your own DIY moisturizing leave-in spray for your natural hair with ingredients that you probably already have in your house.