How dry should the air be?
Humidity is really important for moth orchids. Constantly dry air causes the water in their leaves to evaporate and makes them wilt. Keep them away from heaters and avoid using air conditioning and dehumidifiers in the room if possible.To increase humidity around your moth orchid, sit it on a saucer filled with pebbles and water, making sure the plant does not touch the water. Misting also helps improve humidity, but make sure the plant has time to dry out before night time, as damp leaves encourage black spot and other fungal diseases. Alternatively, keep your orchid in the bathroom; it will love the heat and humidity.