I think it is possible to have buildup on the ends. Make sure you are gently scrubbing all of your hair with the conditioner. Because it is CG-friendly and without sulfates you have to work a little harder to get a squeaky clean feeling. Although this is quite a reversal :P

If you don't want to start over with a sulfate shampoo, try a baking soda scrub?
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MOD-CG since Oct. 21 2009
2C, thick coarse hair (& lots of it!)