Hello, I am not having any luck repotting Oncidiums or anything with a bulb (Miltonia). They do not thrive and die shortly after repotting. What am I doing wrong. Most of them come tightly potted in moss. Is it the transition to bark media form? I would appreciate any help. I live in New York and I grow my orchids indoors all year round. I have had better luck with Phals.