I have a phal orchid which in the past has bloomed twice. This time, however, the flowers are developing normally, but for some reason the petals are stuck and won't open up. At first, because this orchid had never bloomed in the winter, I thought it was the cool weather delaying the flower but the petals seem to be drying out as if they're about to fall. I haven't done anything different this time so I don't know what, if anything, I should be doing to fix this. Any advice would be appreciated.