I clarify whenever I feel build-up or my hair gets overconditioned. I usually do a DT after clarifying if it's for build-up. If my hair is overconditioned, I don't DT since that would over-condition my hair again.
*Poster formerly known as Bailey422*

Here's all you have to know about men and women: women are crazy, men are stupid. And the main reason women are crazy is that men are stupid. ~ George Carlin