Remove Product Build Up from Hair Naturally!

I have long, straight hair that I coax into being sleek, shiny and smooth.  Because my hair doesn't behave this way naturally I have to call in the support of styling products to help me tame the mane.
Hair sprays, spritzes, mousses and gels create the look I want, however they can build up over time and make my hair dull and flat.  Styling products don't dissolve completely when I shampoo. 
The best way to remove product build-up from the hair is to provide more in-depth cleansing than usual. The use of a clarifying shampoo once a week is a really good beauty habit to develop. 
If you don't want to purchase another bottle of shampoo head to your kitchen for some baking soda. 
Once a week, I add a teaspoon of baking soda to the amount of shampoo I normally use and mix it all up in the palm of my hand, lather and rinse.  Yes, it's that easy!
I started using the baking soda trick years ago when my daughter was on a swim team.  The ends of her hair were split, dry and lighter in color from the damage caused by chlorine build up. Another mom recommended the baking soda routine.  By the way, thanks other swim mom for sharing your wisdom! 
Regardless of your hair length or styling routine, product builds up.  Fight it naturally and gently with a key ingredient from the kitchen.  It works well for me.
What do you use to fight product build up? Would love to hear what else works.  Share your wisdom and comment below.

-Monica