Don't know about 'cones, but your products have polyquats and mineral oil--Heaven in Hair (polyquats 7 and 10), NoPoo (polyquat 7) and Joico K-Pak (mineral oil.) All cause issues for me. I'm told that the polyquats don't build up, but I need a pretty strong surfactant to remove them. There are some people who can use mineral oil, but most of us stay away from it. As firefox said, something may be coating your hair and not letting in the moisture. My guess would be the polyquats and mineral oil.
Although I use really rich products, I can't use the SM Coconut & Hibiscus. It too heavy--if you get the difference. It just sits on my hair and doesn't absorb.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me