Lately there are many tendency to say that the leaves are sprayed with water,honestly, that water remains permanently above the leaves can be a serious source of disease, but increases ambient humidity is good.
Just pulverize if the humidity is low, but without the water stand on leaves. It is also important to remove the dust from the leaves once in a while, but not with a cloth as we show in the picture, is better to take the plants into the shower and cleaned well with warm water that is between (20 and 24 ° C).