> but even the evaporated vapor from a pot of simmering soup can make it momentarily angry. It sounds like it can't tell the difference between water vapor and

> but even the evaporated vapor from a pot of simmering soup can make it momentarily angry. It sounds like it can't tell the difference between water vapor and harmful pollutants. Not that it needs to for it to do its job, but the machine may not be a good indicator of actual pollution levels.