Welcome! Do you have harder water or swim/ have you tried a chelating wash? What are your hair properties and dew points? Are you using a rinse out conditioner?
I wouldn't personally use that banana conditioner as a leave in, I can't see how putting fruit puree in your hair is going to benefit it by providing any sort of slip or 'nourishment'. Normally I'd say use far more leave in, but I can't imagine how that would work out.
Shea butter doesn't really penetrate and can build up. Are you doing any protein treatments?
See the stickies on this and the newbies board and/ or the Live Curly Live Free website if you don't understand properties and dew points.
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