What is Xlear Nasal Wash? Xlear Nasal Wash is an all-natural product that helps the body's natural cleaning process wash away bacteria, pollens, dander, molds, allergens and other irritants that cause nasal congestion. Xlear contains Xylitol, a naturally occurring substance and one of bacteria's natural enemies. When certain harmful bacteria enter the body, they attach to the membranes of the nose and throat. Xlear Nasal Wash merely flushes harmful bacteria and pollutants away. What are the benefits of Xlear Nasal Wash? Over 90% of all infection-causing bacteria enter through the nose. Clinical studies have shown that Xlear Nasal Wash with Xylitol, when used regularly can substantially reduce sinus and upper respiratory infections including otitis media (middle ear infections) by reducing the ability of harmful bacteria, pollens, allergens and other irritants from adhering to nasal tissue.