I have been blessed with thick, unruly hair which for most of my life I've kept long. My hair wants to be big. Very very BIG. It's also wants to be curly but falls short. Instead it's usually a lame inbetweener of wavy and frizz that seems to defy even flat ironing and only behaves about one day a year.
Write till the ink is dry
The closest I've come to achieving salon-like shine, sleek and smoothness has been when I spend hours (seriously, like 1-2 hours) blow drying my hair and weighing it down with lots of leave-in conditioning products, and then sleeping in a doobie, through the migraine. And, as much as I was down with that in high school, today that isn't an option any more. I just love myself more.
But what I learned from enduring those ritual of self-induced agony is that even the slightest moisture will undo any chance of combating the frizzies. So dry, for as long as it takes, or don't bother.
There is a cure
Secondly, there is a method to stop the madness, and it's not about any certain product be it high end, dollar store or homemade.
It's about the process of how you treat your wet hair. When you wash your hair, only massage and lather your roots and scalp then and this is the important part, treat your hair to a strong conditioning treatment.
I like to use a bit of Moroccanoil® conditioner with a leave-in keratin for this - I start at the back of my neck and then go down to the ends and with the last bits of products go over the roots and top of my head, comb out the knots and tangles then put up in a soft bun and cover with a plastic shower cap for at least an hour. I go about my day, clearing up my inbox, writing emails and what have you then go back and rinse all the conditioner out.
The heat rising up from your own head warms up the water residue in your hair and soothes and coats it with the conditioning treatment as it locks it in.
You can air dry, twist, or blow dry and style as you prefer but this is the trick to banning the frizz and securing shiny, soft, glossy hair each and every time.
If you over do the oil and your hair starts to limp and lose it volume, just use a clearing shampoo or shampoo a bit heavier and frequently.
I tell you that this transforms my hair like nothing else. It looks and feels like someone else's smooth, soft, glossy hair. I wish some one had told me or taught me this decades ago. I hope it works for you.