system
Given the following post, respond as if you're commenting on Reddit:
human
Does pouring boiling hot water on a toothbrush sterilize it?
gpt
At standard pressure, boiling water won't kill everything.  And you'd have to keep your tooth brush in the boiling water for about 20 minutes or so to mostly sterilize it.  The instant you bring it out of the boiling water though, technically it wouldn't even be mostly sterile any more, as what floats in the air would start to colonize it, plus whatever you're using to hold it with would also serve as a source of recolonization.