I purchased this about a month ago and used it two times so far.  The first time it worked perfect, vanilla ice cream was perfect.  The second time it would not leave the liquid state.  I had the container in the freezer for 48 hours and the liquid in the refrigerator for 2-3 hours.  Not sure why it did not work.  I removed all from the container, washed and dried it and put it back in the freezer for 27 hours and the cream mixer in the refrigerator for the same.  when I made it the next day it turned out okay.  Will try other recipes and see how it goes.  I noticed that the paddle rubs on the clear cover too.  Is that normal?  I know it is in right and the nob is in the hole as I double checked.