Worms crawling up sides
I've had my worm composting bin for about a month. It is an 8 or 10 gallon plastic bin (can't remember which size) that I made following directions in the book "Urban Homestead." I drilled big holes on the bottom. It has tiny air holes punched all the way around (used a 1/32 drill bit) at the bottom and at the top, and also all over the lid.
When I got my worms (1-1/4 lb.), I set up the bin with damp shredded newspaper and leaves, then I dumped the bag of worms along with the medium they came in (looked like soil, but not sure what it was exactly) into the bin. A few days later I checked and didn't see many worms. I thought they might have gotten too cold, so I brought the bin inside. A few days later a lot of them were crawling up the sides of the bin. My husband said they were probably too hot. I then moved them to the garage. The person I got the worms from said to reach in and stir up the bin some, because if it gets packed in, it will become anaerobic. So now I do that every few days or so. I see worms everywhere now. But a lot of times there are several crawling up the side of the bin. Can anyone tell me why they might be doing this? They look healthy enough, and I might find somewhere between 5-10 of them crawling up the sides. My bin is probably only about half full - could they be doing this because they need more bedding to give them more space?
Thanks in advance for any help.