If your dry shampoo isn't spraying correctly, please reach out to Living Proof for a replacement. How to use PhD Dry Shampoo What makes Perfect hair Day Dry Shampoo different than others on the market? There are countless dry shampoo options available that don’t actually clean your hair. PhD Dry Shampoo was designed to mimic a regular shampoo and the effects of washing your hair, giving you similar results as if you just washed it in the shower. Does it work on all hair types? Yes, it can be used on any hair type. For thicker, coarser hair texture, section more thoroughly. For curly hair, remove powders with a blow dryer (vs. fingers or brush, which will deconstruct the curl). I see white residue. What should I do? White residue that is easy to remove is normal and expected—especially if you have dark hair. To remove the white residue, rub and massage hair with fingers and/or use brush. If white residue still exists, use a blow dryer. What is the fragrance used in Perfect hair Day Dry Shampoo? The fragrance in Perfect hair Day Dry Shampoo is light citrus scent that’s similar to what’s found in most other Living Proof products. Can you layer with other products? Yes, you can use PhD Dry Shampoo on top of hair products you used on damp hair to style (i.e. a styling cream). You can also use it before using products on dry hair to re-touch (i.e. a hairspray or finishing serum).