They are absolutely fine! Did a 3/4 clean up on the tank, I removed them but podge got a bit vexed and nearly sploshed water all over my room...All was fine though and the tank no longer smells...lol!
The worms kept dying though and so yesterday I ordered a worm farm thing, for kiddies, on ebay and some small worms. It all came today and I set it up so I will see how it goes...
Youurs?