A:AnswerHello toothy - Salt/saline is okay to use with the Ion model. For more information, follow this link: https://www.waterpik.com/product-support/articles/waterpik-mouthwash/
A:AnswerHello Sunshine - The Ion unit is not completely waterproof and cannot be used in the shower. For further information, please contact us at 1-800-525-2774 or send an email to [email protected].