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Well, it cleared up my sinuses alright. Also the sinuses of every neighbor, family member, friend,enemy, and people I have never met in a four-mile radius. In fact I heard a flock of geese flying over on their way north, and they deffinietly sounded much more clear after they passed through the cloud rising from the tub. And it must keep Walled-Eyed Lumurs away - I know we haven't seen one within a mile of the place ever since.