HE HH has a cone but the HE Smooth should work as a clarifier.... you're saying you washed with this and it didn't work?

I honestly don't see that much of a difference in your before and after pictures, but I believe you if you say your hair feels like it has buildup in it.

^Jessiebanana pointed out that a lot of your products have ingredients that buildup.

Try clarifying again with the HE Smooth (or heck, some diluted dishsoap if you need it), and then add a simple conditioner and a product with all water-soluble ingredients that won't build up.... see if that helps.

Otherwise do you have hard water? You may need a chelating poo.
fine - low/normal porosity - medium density - normal elasticity.

Currently using:
Cowash: Cure Care diluted with water 1:1
RO: Cure Care, V05 Kiwi Lime
Styler: UFD CM (old formula), FSG + CNPF
PT: IAgirl's gelatine

Experimenting with: no guar hydroxypropyltrimonium chloride, gelatin gel

Recent findings: my hair likes Cure Care diluted with water as a cowash; does NOT like guar h.c.!

iherb discount code: CFN646