How often do I change the water in my pillow? Customer Service Desk November 03, 2021 17:53 Updated Follow We recommend changing the water every 6 months to a 1 year. Please do not leave the water in the pillow longer than 1 year. Related articles How Do I Wash My Pillow? When is it time to replace my Memory Foam Pillow? I Wake Up With A Very Sore Neck and Upper Shoulders, Will This Pillow Help Me With My Issues? How do I fill my Mediflow Water Pillow? How Much Water Should I Add To My Pillow? Comments 0 comments Please sign in to leave a comment.