I've made my own vermicomposter. I have noticed that my worms are trying to flee. Whenever I open my bin cover, I find anywhere from 10 to 25 worms trying to climb out the sides. I originally had my bin in our sun room (it's winter now), but I felt as if the fluctuating temperatures were probably not too good for the worms. Now, I've placed it in the garage, up on a step so that it's not touching the concrete. I was wondering if it was too wet (I do have a drain drilled in), so I've wiped down the sides a couple of times to remove the extra wetness, so I don't think that's the issue. I'm trying to figure out if the bottom layer is not dense enough/too dense. Any ideas out there??
Fleeing is definitely a sign of unhappiness. Are you putting in enough bedding? Are you overfeeding? Too much acidic food (such as orange rinds)? Try using a cultivator to prod the bottom layer and introduce more air in case the bacterial activity has become anaerobic (it will smell bad if that's the case). Hope this helps --A