Hello everyone. As the title suggests, I am wondering if any form of substrate is required for Crickets. For my first batch I did not use substrate and quickly found out how fast feces collects, making the container look unsanitary. I then placed newspaper in the container, and the few Crickets that I had left died within three days. Was this a coincidence, from some other unknown cause, or from the newspaper? Basically, is a substrate recommended for keeping feed Crickets?