Bacteria adhering to the wet-bulb wick can proliferate during tests and block water supply. Wash hands with soap and water before handling the wick.
Make sure the tail end of the wet-bulb wick is aligned with the tip of the wet-bulb temperature sensor. Humidity control can be destabilized if the sensor is overly exposed or it the sensor is out of position.
Lay the bottom of the wet-bulb wick in the trough of the wick pan.
Remove the wet-bulb wick for temperature-only tests, especially if running the chamber above room temperature. When the wick dries out from heating, it becomes harder for it to absorb water for the next humidity test.
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