how long after a substantial hatching of a ooth should one hold on to it to see if any more would hatch out as two of mine had given me like fifty or so nymphs and a few days passed and like 1 or 2 more came out and should i keep the ooths for a little more time or should i expect nothing more out of them and discard them and go on to the next ooth waiting to hatch!Also after the first ooth that hatched would the next few ooths laid by the same female have descent hatches or should they be less then the first!