I know everyone thinks vaseline is a problem. I don't think anyone is sitting close to anything that sparks. I remembered the other day that sometimes you would walk across your carpet, for example, and touch the TV or something and a spark. That was even far away from the nose. I have been on 02 24/7 for 5 yrs. I went and bought the water based product and all it did IMO was disappear very fast. I talked to my son about that and he did research and the level of flamability is not high at all. I use that all the time even when lips are chapped and such. I use it every night and day for my nostrils as they need to be lubed. Now this is my 5 yrs of experience. I sit at a campfire that isn't sparking but one spark and back off just for the cannula alone. Just my personal input. All the best to you in your journey Greetings from Canada