If you have been in the pool, have a lot of product build up, or aren't noticing much of an improvement from your regular clarifying treatments: super clarify! How?
Mix 1-2 teaspoons of baking soda with your regular shampoo. Let the mixture sit on your head for two to five minutes. Rinse. Repeat.
This super clarifying treatment can be used as often as necessary, but careful with colored hair, it can fade your color a little bit.