So far so good! This time I just used a lot more dirt at the bottom, and moved my tub out of the sunny corner.
I'm not sure what my objective is... the compost only stays in the balcony tub for a few days before it ends up in the garden pile. I guess I thought maybe the worms could get the compost party started.
We'll see! At this point I'm just happy that they're still alive ;-)