Title: Does not adjust.
Review: Tried adjusting this using hygrometer using the specially purchased 75% humidity packet. After 24-36 hours the unit read 8% lower, 67% instead of 75%. I attempted to turn the adjust knob with my fingers without success, so I used a pair of pliers. Since you don't know exactly what's going after the adjustment, I placed the unit in the humidity packet again. You need to wait another 24-36 hours before checking the humidity.This time the humidity read 85%, 10% higher. I attempted to adjust the humidity down without success over a period of a week, alternately adjusting the unit then placing it in the humidity packet. Sent the humidity pack and hygrometer back. What a waste of time and money!
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