To use Black Soap for a shower or bath - Wet your sponge or wash cloth, rub the black soap on the sponge or wash cloth and you are ready for a shower or bath.
To use Black Soap for hair - Wet your hair, rub black soap in your hair until it lathers. Wash your hair, rinse & repeat the process until your hair is clean. Apply your Conditioner. Another way to wash your hair with black soap is to part your hair in sections, wet the soap and rub it thoroughly through each section of your dry hair. Cover your hair with a shower cap for a few minutes then wash your hair. This process shortens the amount of time in the shower when washing your hair.
If you don't use a sponge or wash cloth then lather the soap in your hands and do your thing.