Once your hair is soaked with oil, twist your hair into a bun or ponytail. You can clip it in place by grabbing some hair from your scalp and part of the bun, or use a hair tie to keep it in place. Cover your hair with a shower cap. You can choose to apply heat or not. Applying heat will open the cuticle of each strand so the coconut oil hair treatment can penetrate the core faster. Leave the coconut oil on your hair for at least 30 minutes without heat, or 15 minutes with heat. You can use a hair dryer to apply heat over the shower cap.