I’m using shredded paper and cut up cardboard as my substrate which always damp but not soaked. The walls of the container are always moist. I feed them food scraps from a local grocery store which contains mostly watermelon rines, cantaloupe rines, honeydew rines, pineapple peels, and occasionally lettuce and spinach leaves. I read that they needed a neutral ph so I’ve recently added lime (the soil additive not the citrus fruit) to their food.