Thank you for your research on this. I am going to continue to research this as well. I am a care giver and this smell of my 88 year old mother needs resolving. I will pass along anything I find as it is an area that I imagine a lot of people will benefit from the findings on. I am talking about the certain smell that is unique to nursing homes and the elderly. You know it if you have been to a retirement home. I need to find something that cuts thru the nonenal I guess it is called. I'm brand new to this search and was encouraged to see you knew what nonenal was or have at least heard of it! Thank you!