Cleaning it seems to have done the trick for now. That was last fall when I did it, so every little bit helps. When I took it to the Honda dealer they said that it could not be cleaned. I discussed it with the auto shop teacher at the school I am at and he said that he has cleaned them before and it can't hurt to give it a try. It only takes a few minutes to get the part off and I let the cleaner soak in for about half an hour before reinstalling.
I did put a new gasket on it prior to the install.