Help with my Ped Egg thing porfavor :]?

okay,so i have a ped egg,i have: a href="http://i3.iofferphoto.com/img/item/357/320/16/pedegg2vx5.jpg" rel="nofollow"http://i3.iofferphoto.com/img/item/357/3…/a so um,u know the top part? the one that you rub against your foot? well its on really snug,and im trying to empty it,but i cant seem to get it open.how do i open it?