https://news.ycombinator.com/item?id=31828469 https://news.ycombinator.com/item?id=31828469 indicates that there was a "mythbusters" that looked at whether germ

https://news.ycombinator.com/item?id=31828469 https://news.ycombinator.com/item?id=31828469 indicates that there was a "mythbusters" that looked at whether germs would reach things like tooth brushes in the bathroom. So... maybe it is more plausible than you seem to be allowing? (I'm planning on watching that full episode later. Seems to be https://www.youtube.com/watch?v=1pFww_EaLiY https://www.youtube.com/watch?v=1pFww_EaLiY.) Edit: That must be the wrong episode. Will keep looking for it.