I seem to have a problem timing my watering when aurantiaca, skinneri, bowringia, guatemalensis, etc. They start to initiate new growth and roots, then the roots grow about 7-8mm, then turn brown or dry up. I usually give in to temptation and spray with water to keep them from drying, but they still crater on me. Not sure what they really need because my humidity varies a lot, usually pretty low in the winter and spring, even in my small greenhouse. Should I just ignore them? I do not have this problem with my Broughtonia, but do, to some extent with the Cats. I do use R-O water to some extent, but usually only about 90%. I have misters on every hour for about 15 minutes during the day (aimed at the floor) and an evaporative cooler when needed. Just not sure what I am messing up. Thanks! Hoping for enlightenment.