Try the finger twist on just the top-crown of the hair, sometimes you need to remind your hair that it has a curly structure. (twist or twirl with your finger before gel after leave in) just try one or 2 strands and see how that reacts for the rest of the day.

It has worked well for me. after my leave in, I finger twist just the top layer of my hair to get that neat even look. I do that probably for once in 4-5 wash and it helps form curls and remind my hair then and there that it is curly