Whink® Steam Iron Cleaner. Unclogs hard water deposits. Also great for vaporizers, showerheads & sterilizers! Steam from water level. Easy one step. From Whink®...makers of rust stain remover. Close tightly, while pushing down turn. Comments, questions: call weekdays 9-4 CST Toll-free 1-800-247-5102. www.whink.com. ©2010 Whink Products Company.