Infuse with at least two other herbs to make a strong infusion tea by boiling it until the water is tinted, then strain into a pitcher and add water to fill the rest of the pitcher. Sit in an empty bath, and pour the lukewarm mixture over your head. Do not wash the mixture off, allow your skin to air dry. Praying beforehand helps to set the intention for the bath.
Read this article to learn more about making spiritual baths. (article coming soon)