How do i maintain my curly weave to make it last longerj?

I have the deep wave synthetic weave. ive only had it for five days and its already gettin frizzy. i wear a net and slik do-rag to bed. what else can i do to make the curly weave last longer? thanks.How do i maintain my curly weave to make it last longerj?
INSTEAD OF THE DO- RAG WEAR A SATIN BONNET.. IT HOLDS THE CURL LONGER.. AND IF ITS THE SYNTHETIC WHICH IS FUTURA TEXTURE(SOMEWHAT SILKY, CAN WITHSTAND HEAT 2 A LOW TEMP) U CAN EITHER SPRAY WIG SHINE OR JUST PUT CONDITIONER ON IT AND IT WILL SNAP BACK