system
Given the following post, respond as if you're commenting on Reddit:
human
Since bacteria are so plentiful on everything on earth, how does NASA stop any potential bias of even dead bacteria on the Mars Rovers?

If there are bacteria on everything, how do they stop the bacteria from biasing any potential results, even if they are dead?
gpt
Me and a buddy of mine at a NASA internship got a chance to get inside the JPL cleanroom the Curiosity was assembled in. He had to take 2 special showers before he went in, and wore a special anti-static robe, mask, and hairnet. Before they let us in they detailed the extraordinary precautions they take before letting any employees in. They check for cold sores, open wounds, pimples, a case of the sniffles, anything. Suffice to say they are 100% dedicated to preventing even the most minute causes of error.