How do I prevent my curly hair from being flat on the top?

I've always had very curly hair. I style it by simply putting in some light mousse and scrunching it while wet, and then letting it air dry. This has always resulted in great curls. However, my hair has recently become much more straight. I'm using all of the same products and shampoo and don't know why this is happening. I miss my curls! It is still pretty curly at the bottom, but the top is almost completely straight. Any styling advise to bring the curls back?How do I prevent my curly hair from being flat on the top?
Layers!How do I prevent my curly hair from being flat on the top?
you add a little gel in it or mousse and scrunch it
its probably cancer.