Folks,
You might give all this searching for medical grade CC a second thought or call the Manufacturer to see if what you think you are getting is really what you will get.
I purchased some medical grade Long Wood Handle Q-Tips from Walgreens and that is exactly what I got. BUT - the package say they are not sterile and then tells you how to Autoclave them to make sanitary (medically speaking).
Remember that most of this stuff comes packaged in paper bags inside cardboard boxes not exactly impervious to contaminants.
It just seems to me that any product sold for use in and around the human body i.e. Sally's CC comes pretty clean and for sure as cleaner than any tobacco cigarettes (and filter material) you ever purchased. I lived in Kentucky and saw how tobacco was handled and processed... let me just say CLEAN was not a big consideration unless you consider a bail of hay clean.
Remember that anything used in a hospital environment and needs to be absolutely sterile comes sealed in special plastic containers and has a very, very high price tag due to the clean room handling. The cotton balls that the Nurse uses to clean your skin prior to an injection has been sitting in a jar loosely sealed for weeks then dipped in alcohol to clean the cotton and you.
Also you are going to take this CC material witch is at least as clean as a bar of soap (the same soap that you will peal the paper off of and then apply to some of the most extreme orifices on your body) and soak it in PG and Nicotine both of which are not friendly to any viral or microbe contaminants. Oh, and then heat the part you inhale to over a two hundred degrees F. Compare that to the recommend heat most meats and pre-prepared meals recommend which is typically 160 degrees F.
I am just saying that some of this cleanliness of the wicking material seems a little extreme when most of us have no idea what the cleanliness of our e-juice is albeit as I said most of the chemicals in juice are not friendly to living contaminants that doesn't mean it is pure and that it doesn't contain chemical and/or solid contaminants.
Rant over and out...