I had this neat whip-it pencil sharpener in my advent calendar today, like this one:
Mine has different colors and seems to have been a promotional item from a German bank (Sparkasse) once.
The trouble is it doesn't twist properly. I can move all three layers as if they were one. I can also twist the top layer when I use a lot of force, which is neither fun nor does it seem to be very good for the puzzle.
Does anyone have an idea as to what can be done (e.g. Can it be taken apart?, Should I lube it?,...)?