I have problems with frizz. For me both the products and combing has made a difference for me. Especially during winter I get lots of frizz and I just have to comb my hair after I have put in my leave in (then I scrunch). My hair gets a little straighter but I get much less frizz which I prefer.
Maybe something like Curl Keeper
would help you? It didn't do much for me but others really like it.