I was given one almost 2 years ago, it was in bloom. The instructions that came with it said to make sure it had good airflow, and don't overwater. It's in my kitchen window facing east. I water only when it's dry, but I let it sit for several hours in water to let the moss soak. It did bloom again on its own in the spring, and I was pleased to see the blooms lasted for quite a long time.
Long story short, I don't know what I did to get it to bloom again, sorry!