What have you been using for media? Keeping them as damp as a paph is too wet IMHO. Error on the dry side. They also like to be quite a bit warmer. They grow best in temps in the 80's and even low 90's. They will live in cool temps, but not grow much. Commercial growers keep their greenhouses this warm. Mine all grow like crazy during the summer months when temps are very warm. Do not water in the latter part of the day and keep up good air movement. Check out this thread and read the associated links for some great information and then see what you think.
Grow Phals like the Pros!
mike