Embodiments of the present invention relate to humidity adjustment. In some embodiments, a humidity adjustment device is provided. The humidity adjustment device comprises a container including a wall for defining an accommodating space. The wall includes a water separating element for separating a mixture of water vapor and liquid water, wherein the water separating element includes a sieve portion adapted to separate the mixture of water vapor and liquid water, characterized in that the sieve portion comprises holes whose sizes are in the range of 25-35 microns. Corresponding apparatus and method are disclosed as well.
