Ok just wanted to check that it wasn't a blend of garden-variety mulch, as those are not usually treated to kill off bug eggs like the reptile mulches are. It looks like some eggs may have survived - is anything hatching in the bag of mulch that's left? I would just treat the same way as for mites, and you can bake any remaining mulch in a roasting pan at 200*F for about half an hour to kill off any remaining eggs.