Clones require much more humidity ( as i'm sure you knew that ). The leaflettes will actually increase and decrease in size based on the water available and the humidity of the air around it. when there's a good amount of humidity in the air, the water is stored in the leaves. Just like when there's a dry spell, the leaves will become much more narrow, like boney fingers, rather than fat fingers

Like a cactus really, it stores the water for when it needs it.