When I was raising supers it sure did take a long time to get them to grow. If you have had your beetles in the same container for a month, you should transfer them out to another one. I did this monthly, whether I noticed any new supers or not. Eventually, you will see some small movement, but it will take a long time. I had a small colony going, but gave up because my dubia were doing so well. There are a lot of threads on here about raising supers and a lot of members have had luck. It just wasn't for me.