Well, I do a mix of co-wash, really low poo (SM), and low poo with coco-betaine once or twice a week. I'll clarify with a gently SLS poo mixed with my low-poo as needed, maybe every couple weeks at most. So I wouldn't think build up would be a big problem for me, anyhow.
And since a-cone is designed chemically to no build up, it shouldn't be an issue anyhow. It just depends on whether one's hair responds well to a-cone, or if all the ingredients being used play nice together.
C-cone isn't supposed to build up, either. It evaporates, tho, so it can be drying. Again it depends on how one's hair responds to it, and if the ingredients in everything you are using work well together.
I'm hoping to give it another try tomorrow!
2c/3a/3b, Fine/med, Dense, high porous, & normal elas.
Lo-poo - Renpure Keratin, SMR, Giovanni SaS
clarifying - mix Johnson's H2T with low poo
Co-wash - Suave Nats. clar. or coco.
RO - GVPCB, Ion Eff. Care, TN.
LI - SMR, Cure Care, or RO
Seal - MO or Jojoba
DT - + honey, ACV, & EVOO to SM masque & GVPCB
PT - Gelatin!, CNPF
Styling - FSG, AIF, BRHG, LALS/PS, GF curl spray gel, SM Souffle/Smoothie, LOOB
Oils - MO!, EVOO, jojoba, GSO, SM Elixer, EVCO, VO5 Hairdressing