OK, so grass was really frass and frass is not at all like grass but really "waste." Got it......Leave the empty box and "after a period of time" all the eggs will have hatched. About how long is "after a period of time?" Days, weeks? How long should I wait for something to happen, please? After the eggs all hatch, at whatever interval of time, I then toss the remains in the garden as composting matter or do I sift out the frass and start again? Oh, and once again.....not to be stupid but what do I use to sift? I tried a colander again today and get almost nothing out! Wish it made more sense, but I am sure I'll "get it" with answers soon. Thanks!