A vehicle system includes: an olfaction sensor comprising: a blower configured to draw air through an inlet; a dehumidifier configured to decrease a humidity of the air; and a sensor located downstream of the dehumidifier and configured to measure an amount of a chemical in the air after the air flows through the dehumidifier; and a control module configured to selectively take one or more remedial actions based on the amount of the chemical in the air measured by the sensor.