Hi all. Got a toilet tank with a leaking flapper/valve seat. Tried a new flapper, it leaked worse. Put back original. Only thing that helps is using a rough sponge to clean the valve seat rubber, but I have to do it at least every two days or it leaks again. Here's a link for the typical setup: http://www.toilet-repairs.com/photos-diagrams/toilet-float-ball-flapper-diagram.gif Do I need to replace the entire tank workings? I have a second toilet where I put in a new flapper and cleaned it and it's been fine. But the first one is just not cooperating.