Thoracic doctors have known this for years. We now have an independent study that proves it. A 20 yr study with 6200 participants proves that cleaning once a week with Bleach, Ammonia or other quaternary disinfectants is equal to smoking 20 cigarettes a day.
You can google “20 yr lung study” and find information from CNN, Women’s Health, Web MD and many other media channels.
Here is a link to a synopsis: http://bit.ly/IndLungStudy
If you would like to read the actual paper, go to: