As far as I know there is no way to repair them, the way they're designed it's not cost effective to try. The good news it that if you stick with the same brand you can swap it out in under an hour. You don't have to replace the mounting ring and there's no real changes to make to the plumping. Just be sure if you have a garbage disposal to knock out the plug in the disposal connector.
Answers & Comments
As far as I know there is no way to repair them, the way they're designed it's not cost effective to try. The good news it that if you stick with the same brand you can swap it out in under an hour. You don't have to replace the mounting ring and there's no real changes to make to the plumping. Just be sure if you have a garbage disposal to knock out the plug in the disposal connector.