For me there isn't a difference, over-conditioned and product build-up looks the same in my hair. Wet frizzy hair that is too soft, limp, greasy and hard to style. And I solve it the same way, too - cleanse and use a pt. But like I said, that's just my hair.
4a/3c, fine strands, low porosity, medium density
Last relaxer: Jan 2010 - BC'd: 2/27/11