Everyone loves to have that shiny helathy looking hair. Here's an easy way to get it... VINEGAR!
Yep...rinsing your hair with vinegar once a week (one part apple cider vinegar to 4 parts water) will help with product building up and help restore shine to your hair. You can also add a few drops of essential oils if you like. But if the smell turns you off, you can use Bumble and Bumble Sunday Shampoo. Same benefits, less smell.
Oh... and if you were doing the end of the shower cold water rinse to help with shine. STOP! You are actually damaging your hair. While I was told it helps "close the hair shaft" its actually constricting the capillaries, which could lead to damage. Bye Bye Cold Water rinse!