I bought the ice cream attachment a few years ago, however I only use it one or two times a year. Recently, I put the attachment in the freezer to "pre-chill" befor using and 24 hour later I found it to be leaking a blue-colored liquid out of a small area near the top of the attachment.  The liquid leaked onto the floor of the freezer (see photo).  I did go ahead and use it, (and it works fine) but it continues to leak.  After reading others' reviews, this appears to be a known problem with these attachments, and hopefully this design has been corrected.  While I love my KA stand mixer and other attachements, this one is a dud.  I would not recommend purchasing this unless I had assurance that this leaking issue has been addressed.