Product review (1 stars): I would buy anything over these if there was a choice.  Amazon needs a negative star rating.
This is an awful part - I can't add anything to what has been said.  The melt, peel, break.  I wish I had a 3D printer to make my own.  The cost of them must be less than 10c.  I would love to find a ceramic after market replacement.

As quickly as these discolor and melt, it might be better to replace them with clothespins.