Saltware is safe to exposure of up to 75% humidity.

Beyond that it is better to keep it inside its  original box. 

 Don’t worry – it won’t be melted even if it was exposed to higher humid level.

 Just wipe the dew drops that may cling to its surface.

Nevertheless, if that occurs it means the humidity exceed 75% and it is advisable to keep it in a cabinet or in a box.