Water Pik, Inc. Recalls Sonic-Fusion® Flossing Toothbrush Product for Possible Health Risk. The charging base may overheat with localized melting and sparking, possibly causing fire, shock or burns. Consumers who have the affected units should stop using them, immediately unplug the unit, and return them to Water Pik, Inc. Learn more: https://www.fda.gov/Safety/Recalls/ucm613512.htm?