Run water over the bar and lather it up a little in your hands
If you have short hair, you may find that just using the lather from the bar to smooth along your hair and scalp will do the trick
For longer and thicker hair, use the bar directly on your head. Smooth the bar from your hairline to the crown, or work in gentle little circles around your head, then use your hands to gently massage the scalp and hair
Use the excess product to wash the tips of your hair strands
Some Zero Bar fans like to use a wide-toothed comb to comb through their hair while it's lathered and soapy, continuing to do so through the rinsing process.
Be sure to rinse thoroughly
Give it a try!
It's a great feeling to use a shampoo bar that allows you to feel good about your hair and your environment.