First you take a bath like you normally would with soap and water.
mix fresh lemon and baking soda in a bowl
While you are still in the shower, turn off the shower, then apply the baking soda and lemon mixture all over your body and scrub your body as you are applying the mixture.
Wait for a minute or two, then rinse your body with just plain water. You will notice a change instantly, but if you continue to use the mixture everyday you will notice a huge difference.
I know this because it worked for me.