Maybe my way will help you.
I have the moths lay their eggs on brown paper. Then I cut the brown paper into small pieces and put in the refrigerator. When I want them to hatch I take out a piece of brown paper and put it into a small square ziplock container without a lid (nothing on the bottom). I then put it in my incubator set at about 80. In about 2 weeks they hatch.
I have seen the strip method but I don't do it that way. I bought a very fine grater and just grate chow over them. Then I put the lid on the ziplock and put them back in the incubator. It is necessary to put the lid on so the chow does not dry out so that the silkworms cannot eat it. Before I go to bed I take off the lid and lay it on top kinda at 45 degrees so their is airflow to dry out the old chow. In the morning I grate more chow on top.
When the silkworms have grown so that the comtainer is full I use a spatula and scoop 1/2 the stuff and silkworms into one large rectangle ziplock and the other 1/2 into another(again nothing on the bottom). Then I continue to feed them every day. I never clean out the containers, or try to move them one by one. I just grow them on the built up frass and then feed them out. In the past every time I tried to move them or clean out their environment I had a die off.
There also has been a silkworm virus around in the recent past. Sunlight kills the virus. You should lay containers, incubators, etc. out in the sun for a few hours if you think this may be the cause.
Hope this helps.
