Over two months, scientists found that those treated with nasal irrigation reported greater improvements than those treated with a spray. A 2007 study at the University of Michigan USA looked at 121 adults with chronic nasal and sinus problems. In one independent study in 2008 researchers examined a group of children with severe allergies. They found that regular nasal irrigation with a mild saline solution significantly eased symptoms and helped reduce the need for steroid nasal sprays. Neti pots are available at all Yoga in Daily Life centres.