I do not know much about peace lilys but i dont think you should be so quick to chuck it someone will come around and comment on what you should do
but what you can do to satrt anothe rplant from yours is if your has any
seed heads on it wait for that sead head to turn black and harvest the
seeds from them and plant it (the
seed head kinda looks like a catipiller)i dont think you would have to worry about pollinating the
seed head for the
seeds to grow because the
flower should self pollinate the
seed. But it may take a couple of years before they
flower.