I have noticed, in only one nostril, a slight mildew scent. I only detect it if I pull slightly on the upper edge of my nostril as if to scratch it. This has been an ongoing, but intermittent problem I ve noticed for several years. At first, I thought it was perhaps something under my fingernails which I keep trimmed and clean. But using the same hand, I do not smell the odor in the other nostril. My wife got close and said she could also detect a slight mildew scent only on the one side. She suggested swabbing the inside of my nostrils with coconut butter on a Q-Tip. This does seem to help with the odor, but I don t want to mask any serious problem. I suppose I could see my doctor, but I saw your website and thought I d check here first. I have good personal/oral hygiene and am in overall good health. Thank you!