How To Prepoo Natural Hair With A Cheap Conditioner This is what my hair looks like before I prepoo. Section your hair into a medium size section and spray your hair until it’s drenched with water. This is the conditioner I’m using for this example. Apply the conditioner to your hair and rub in into the hair until you start to feel your hair soften. Once your hair softens, detangle your hair. Put your detangled sections of hair into big twists. This is what the finished look looks like. Now I put my hair into a shower cap and allow the prepoo to sit in my hair until I’m ready to wash my hair.