Product review (5 stars): EASY TO REPLACE, AND PROBABLY SHOULD BE REPLACED EVERY 8 YEARS OR SO
I was not sure if this was the reason my icemaker failed (see my review on 4389102 control board kit), but after I removed the icemaker from the freezer, I could see that the ice cube tray was trash.  You'll know what I mean when you remove yours.  There is some kind of coating they put on the aluminum tray, and it was cracked and peeling, and had a funny odor, which made its way to my ice cubes.  You can't scrape out the coating as it is like a teflon coating to help the ice cubes pop out.  You can probably try to buy the separate pieces to rebuild the unit, but I opted to just get the new unit and keep the old one in case I might need a piece for a future problem.  Also, the timer board in the icemaker unit is an expensive part so this is also a potentially good spare.