How to make the great curls. I have straight, thick hair, as many people know, curlers do not hold longer than 2-3 hours, and it is not what you want to get. There is a new solution of this problem! Great gorgeous curls can hold up to 5-6 hours and it is very simple! 1) You have to wet the hair with a little water. 2) Twist the hair into a knot and handle them with a hair iron.