Water Pik, Inc., perhaps best known for its oral care devices line, is expanding into the hair care with the new Waterpik HairWand Spa System. The launch comesvia the Fort Collins, CO-based compay’s replacement shower heads business.   The Waterpik HairWand has three therapeutic wand streams and nine modes in the fixed shower head that provide a complete rinse in less than one minute. The company contends it will  improve hair manageability; help to naturally detangle hair and promote a healt...