Slate is committed to providing you with the best flossing experience possible. In accordance with this mission, Slate Warrants its product for 1 year after the date of purchase. Slate will promptly replace any defective items due to fault materials or workmanship so long as proof of purchase has been provided within 1 year. The Slate Warranty applies when the product has been handled properly for its intended use as described in the instruction manual. Read the instruction manual carefully before using the product. If you purchased your product from slateflosser.com no need to register we have all needed information. If you purchased from amazon.com or another retailer we need you to register and a proof of purchase to aid you with your warranty request.