I just started using DevaCurl products, and they've made such a difference in my hair. It's really curly and gets frizzy when the air is humid
My hair gets frizzy, too - usually because of humidity. 
What kind of products do you use?
Frizz
Frizz is hair that does not align with the surrounding hairs, but stands up or curls independently, creating a fuzzy or irregular texture. The three main causes of frizz are genetics, hair damage, and humidity. Frizzy hair can be seen as a positive or a negative trait depending on the current fashion and one's personal preference. Many hair products, such as gels, pomades, and hair waxes, are designed to reduce frizz.
Definition.
There is more than one definition of frizz. Researchers
In the 1979 film "My Brilliant Career", when the frizzy-haired Sybylla threatens to cut off all her hair, her aunt Gussie replies, "It'd be a pity to lose your finest asset." Today, some people embrace their natural frizz, while others see it as a problem in need of a solution, and advertisements for hair products often present it as such.
Those looking for ways to reduce frizz encounter a great deal of conflicting information online and in the media. Products and treatments that