@Nwanneamaka,ogibaba is Guinea corn,u can equally add millet to it and grind together,u can soak both the millet and guinea corn together for 4 days, always wash very well every morning and change the water to avoid smelling.... after grinding, filter in a shiffon-like cloth, then allow to settle or you pack it inside a bag(there is a special bag for it, ask in d market, you will see it or you buy one yard of d material and sew into a bag, like pillow case). I hope you understand :)