[Frater EIE]

Is it possible to increase a substance's hygroscopicity? For instance, potassium chloride is hygroscopic to the point it becomes deliquesced, fully dissolved. However, sodium chloride, as I understand, is only hygroscopic to the point where it becomes a solid mass. Is it possible to alter sodium chloride in such a way so that it deliquesces?

Thanks
Frater EIE