I've always considered myself to be smarter than the average bear, but for some reason I almost never remember to add Irish Moss. My little 1oz bottle is still over half full after 12 batches. I guess in all the preparation for post boil activity I just don't notice that little brown bottle sitting on the table. So for now I am basking in the glow of satisfaction knowing that for at least one moment I wasn't a colossal retard.