I've been trying for a year and I'm on my third batch of worms. The first two batches died (I think due to summer/compost heat) but the soil they produced was really high quality so I will keep trying.
When it gets warmer I will need to put blocks of ice (in plastic bags) in to keep them cool. Will also try separating some worms and keeping them indoors with a much smaller quantity of food.
We've had worms for composting for about six years now.
To keep them happy, you just need enough paper / cardboard to regulate excess moisture. Plus a bunch of drain holes.
If the environment you've created isn't something a plant would want to live in, a worm isn't going to like it either.
Our worms have survived a tremendous amount of neglect.
Sadly, my wife had our worm bins sitting on the driveway on garbage day last fall and the garbage man mistook them for garbage. Trying to rebuild our colony from ones we dug up from the garden where we had deposited them earlier in the year. It's been slow going and we'd probably be just as well off to order a new batch.
When it gets warmer I will need to put blocks of ice (in plastic bags) in to keep them cool. Will also try separating some worms and keeping them indoors with a much smaller quantity of food.
Good luck!