system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:If I boil a kettle does everything inside become sterile? if so how long does it stay sterile?
gpt
Actually sterilized?  No. Boiling water and steam are damned effective at killing germs, but you generally need much higher temperatures than you'll achieve in a kettle to reach an effectiveness where you can call it sterile (99.9999999%  of microbes killed). In particular, bacterial and fungal spores are generally tenacious little bastards and will survive. For medical sterilization, when steam is used, it's heated under pressure to a much higher temperature than is normally attainable, and objects are kept in for as long as 30 minutes.

As for how long it stays sterile?  Until it isn't.  Once your sterile tool touches something nonsterile, it's contaminated.