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It varies from germ to germ, actually. Some can only live for a short time while others can live on for weeks. But there are also other factors at play, such as surface (http://blog.cashins.com/blog-0/bid/192611/Industrial-Hygiene-How-Long-Do-Germs-Live-Outside-the-Body)
That said, there are also other kinds of 'residue', but most is done away with through a few latherings, I suppose.
I have noticed that brush sellers state that their offering is sanitised. Which would mean what?
That said, there are also other kinds of 'residue', but most is done away with through a few latherings, I suppose.
I have noticed that brush sellers state that their offering is sanitised. Which would mean what?