Which specific polyquats have caused a problem for you in the past? It's a massive family and they don't all have the same properties - really it is as much a naming system as anything. It's a little like surfactants: the anionics (including foamy sulphates) do not behave the same as the cationics (the ones in conditioner). Maybe do as KathyMack
has and analyse your products based on ingredients until you have a short list of possible culprits?
The curl booster is a liquidy lotion consistency so easy to spread, the bottle is a pump not a spray as it looks like. It definitely does something, even in fairly small amounts: less seems to be more which makes it more economical!
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics