The Material Station has a built-in dehumidifier. The dehumidifier controls the humidity inside the Material Station. Silica beads absorb the moisture in the chamber and maintain relative humidity under 40%. The dehumidifier will regenerate the silica beads when they are saturated.
The dehumidifier can only regenerate if power is supplied to the Material Station. If the Material Station has been unplugged for a long period, the dehumidifier can take longer than usual to reach stable conditions.
Note: It is not recommended to store (moisture sensitive) materials in the Material Station if the power cable is disconnected.