So, in addition to my TCH I also have an older VW Passat with a switchblade key that I kept in my pocket for years. The key fob looks terribly worn. I didn't want that to happen with my TCH key fob, so I made a case for it such that the ring still hangs out, but the buttons are protected. (A Tic Tac case also works but is a little less attractive.)

Stan is right, of course, and gave you a direct answer to your question, but you may not want to incur the expense of the dealer.