Used the new cookie press for the first time a few mins ago. The cookies looked really nice when pressed onto the cookie sheet. When I cooked them they became blobs of.....i dunno...dough blobs. It's not like you can easily tell what the shapes are, esp. if you were not the person who made them. Is this "normal"? I am figuring not....what am I doing wrong? We don't have to use any specific cookie dough are we? I mixed up a Betty Crocker sugar cookie mix and used that in the press.