yes, the netting technique is technique used by silkworm farm in India.
Sick silkies are usually lame and unable to climb. The trick is getting rid of them before they start oozing liquids that are highly infectious to others.
Also sometimes grasserie infected silkies loves to climb all over the place (restless) instead of eating, watch out for those silkies. They also leaves milky trail wherever they go.
check this link:
http://www.wormspit.com/netting.htm
as far as my advice in moving the "healthy" one to a new container, it is really a desperate attempt to save them, although I did mention that most likely all of them already infected by grasserie.
Since i suspect some of the silkies are already pop, there is a huge chance the liquid has already "stained" the old container.
Therefore that old container should not be used for healthy silkies at least until it gets cleaned.
My suggestion to clean the container is by submerging the whole container in a bleach solution (10 part of water and 1 part of bleach). Leave it for at least 30 minutes and then rinse real well until the bleach fume is no longer there.
After that, Sun dried them outside for a long time.
When you are about to use the container, wash it again with antibacterial soap and dry it with paper towel.