Paph Sanderianum Culture?

[The Orchid Boy]

I NE, in summer all the transpiration(?) from the crops make it so humid you can hardly breathe outside the humidity is always above 75% and in my room around 60%. In winter the humidity outside is usually less than 20% and in my room the humdity stays around 38% to 50%. Does the humidifier leave residue from mist on the orchid leaves? Does it have to mist directly on the orchids?