RE: A face full of bacteria, every time you take a shower
first, when one lives in the desert , running the shower a couple of minutes before using it is criminal. second, if one lives in a hard-water area, crustiness on a shower head is a given and has nothing to do with bacteris.
i am a scinetist, have been one for at least 60 years. i do not like to read comments by scientists who have avoided thinking about what they write.