My worm bin (vermicomposting) wasn't going on well at all. The kitchen garbage didn't seem to be converted to vermicompost at all.
The number of worms also started decreasing. I knew something was wrong but couldn't put my finger on the cause for a long time (more than a month I think.)
Finally I guessed it : too much undrained water. This is the monsoon, so rains almost every other day. And the worm bin is a plastic tub with poor drainage.
So I siphoned out the stagnant water into another bucket (didn't throw out that black water - it'll make great liquid vermi-fertilizer).
And then covered the top of the tub in a better way such that rain wouldn't collect in it.
So that was on the last weekend, and this weekend (2 days later) I'm going home and checking on it and it will hopefully be working good as before.
Edit : Aug 7 2010 : Yes it seems to be working better now - no more water logging and I saw a nice fat healthy worm and lots of others. Haven't checked the worm population though - but feel it should be getting better.