So after promising my wife that NOT keeping a lid on my superworm bin was ok I was proven wrong. I just got in another 500 a couple of days ago. Filled a plastic dish that is about 15" x 12" and about 5" deep up to about an inch and a half from the top with wheat bran. Found 4 fugitives today got them back in the bin before my wife could see them. may screen a lid or something.