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.
