To simply rule out using brushes is not really the way to go, I know every site on the internet will tell you if you have curly hair to stay away from brushes, but there's just about as many different kinds of brushes as there are hair types! What you should take from this 'rule' though is the reason behind it. Now, in most cases, people are going to tell you to stay away from brushes because brushes especially those with a lot of bristles or bristles that are close together will create tension onto your hair strands when you brush it through possibly causing them to break. Most often the alternative they will give you is to use a wide-toothed comb to de-tangle your hair instead. While I agree with this (you certainly don't want to stress your hair strands too much and definitely don't want breakage,) it doesn't simply mean you have to rule out brushes. I in fact often use what I like to call a 'wide-toothed brush,' which is basically just a cheap plastic brush with those hard plastic bristles that are spaced out just as far if not farther apart than the teeth on a wide-toothed comb. Other people might tell you to stay away from the hair bristle style brushes (such as a boar bristle brush,) because it will make your curly hair 'poof up.' Well, this one you'd just have to experiment with yourself, I think the cause for your hair frizzing out has less to do with what you use to de-tangle it more than it has to do with the condition of your hair. In fact, many others with curly hair swear by the boar bristle brush as it's said to spread the hair's natural oils better thus creating less frizz. Rule of thumb here is to be gentle on your hair with any tool you use. Passed that, use whatever works for you while keeping up the condition of your hair. Good luck!