A lot of my Epi's are wrinkled. Searching google some say too much water some say not enough.
You might want to try this in the Orchid Cactus forum.
Al ~ have yours recently bloomed?
edited to add ~ http://davesgarden.com/community/forums/f/episetc/all/ this is the forum Tikipod mentioned.
This message was edited Nov 18, 2012 9:16 AM