 1. Nasal washing nasal lavage: Nasal washings in the nose are carried out by passing a small volume of salt water saline fluid into the nose. A nasal adapter shaped like an olive is placed inside the nostril. The participant is then asked to sit forward and the salty water solution saline is used to flush in and out of the nose over a one minute period. This procedure is carried out on both nostrils to clean up the nose on the initial study visit and then repeated only on the left nostril on each treatment visit. 