Is your hair usually curly when you wash it? You should wash your hair with some sort of conditioner that doesn't have sulfate in it. Find a deep conditioner and leave it in for maybe 30-45 min, then rinse it out. You can either apply conditioner while it's dripping wet, or pat it dry with a towel, then apply a leave in conditioner or a gel to it. I love kinky-curly knot-today conditioner and their curling custard. It's kinda pricey though, so maybe try eco-styler gel which is organic and a lot more affordable.