Add a bit of non iodized salt. Allow to fully dissolve. If this irritates the membrane then you've likely added too much. Though a sinus infection may make it overly sensitive. Look online and you'll find the proper ratios. If sick or have trouble getting it through the sinus, add some Alkalol Solution Nasal Wash. Cool water works much better at opening the sinus than room or warm temp. As this removes inflammation from the sinus membrane.