When the tank fills up after a flush, water slowly drips from the tank into the bowl. Usually it would stop dripping after about 5 minutes, but recently, it drips until the float is activated and more water flows in. I have replaced the flap, repositioned the flap, but neither have any affect on the dripping. I will probably replace the gasket between the tank and the bowl to see what affect that will have. Otherwise, I am at a loss as to where there is a bad seal. Please help.