They have filters in the air cycling that I assume include some sort of carbon filter for smell. However, astronauts have definitely noted that the ISS has "a s

They have filters in the air cycling that I assume include some sort of carbon filter for smell. However, astronauts have definitely noted that the ISS has "a smell" https://www.space.com/international-space-station-smells-european-astronaut https://www.space.com/international-space-station-smells-eur...