During my recent Clinic visit my CF doctor informed me of the dangers of using distilled water. He informed me that I should in no way use-distilled water for the cleansing of nebulizer (sp?) parts nor should it be used in conjunction with my oxygen machine. He explained to me the risk of contracting B. Cepacia through the water. Apparently, there are no standards in place concerning B Cepacia when it comes to the manufacturing process that creates distilled water. I strongly recommend the use of hospital grade sterilized water for your CF care needs.