If it stops working because the fluid leaked out, then you can get replacement fluid from Toyota. It's been discussed here before, so a search should turn up the part number.

But if the clutch is wobbly, then you'll have to replace it. Take a look in this thread to see what happened to mine: http://www.peachparts.com/shopforum/showthread.php?t=110387

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Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References