Will the shampoo bar leave waxy residue? 16 January 2023 18:38 Updated No, the shampoo will not leave waxy residue or build up on your scalp. Related articles Will you have a conditioner bar? Will I need to wash my hair more frequently with a shampoo bar? Where are the shampoo bars manufactured? Does a shampoo bar work as well as liquid shampoo? What ingredients are in the shampoo bar? Comments 0 comments Please sign in to leave a comment.