Did you use 2 plastic caps and cover it with a satin/silk scarf? And you can lightly spritz your hair before your cover it. Remember to oil your ends only with a natural oil before you put the plastic cap on. Make sure there is no extra product in your hair before you do this. Example: no leave in conditioner or conditioner.
Also shampoo your hair first so your hair is product free.. Remember:
The only moisturizer your going to need is Water. Then seal your ends only with oil. Cover hair with 2 plastic caps then cover your plastic caps with the scarf at least 1 hr to overnight. I usually do my ghe while I sleep. Try doing it before bed and sleep with it on. Hope this helps