Ok, so I'll have to look into better air circulation soon, and some other container options for the bigger orchids. I'll start keeping the jars open more each day for the time being.
I found a book on terrariums at the library, but not orchids specifically. It doesn't deal with air circulation at all. What's a good book on orchid growing that would also talk about terrariums, or similar, environments? I seem to only have a few art-photography orchid books.