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Answers. Best Answer: It's fine to reuse ear plugs as long as you clean your ears each time before inserting them. You'll need to replace them occasionally, depending on how often they're used. I've found that the yellow cylindrical ones work better and stay clean longer than the standard orange ones.
If the rot is only under the flange, use an ear-type repair ring. The ears let you drive screws into firm wood farther away from the flange. Before you install this kind of ring, hold it up to the drain horn on the underside of the toilet. You may have to cut off a couple of ears to make it work with your toilet.