I'd bet the buildup and the dryness is from the polyquats. Some people are more sensitive to those.
That's me with FSG as my styler!!
3b. fine & thick, coarse, dry, medium porosity. Sucks up product and loves ACVs! FSG is my HG!
Low Poo: TJ's Refresh No Poo: CoWash w/VO-5; Sonoma Soap Company sulfate-free poo
RO: Yes to Cuc; SSC Lavender Condish; Sally GVP LI: Donna Marie Miracle D&C
Style: FSG w/Aussie Instant Freeze & CIAB