And also shower mildew?
Use shampoo for the hairspray build-up and vinegar for the mildew, Cheryl.
Mix baking soda in your hand with your shampoo. About a tablespoon of baking soda mixed into a paste with your shampoo.
Here is a site that goes into more detail:
Baking soda will strip the hair spray build up from your hair. Just wash with it in your shampoo like you would regularly, about a tablespoon is all it takes. For shower mildew, you can try scrubbing with vinegar. If that doesn't work, try bleach.
If the hairspray is on surfaces, like the mirror or curling iron, I use rubbing alcohol. For hair I use baking soda and for mildew I use vinegar. What are the problem areas?