Toilet flapper leak

Did you clean the inlet that the flapper valve mates with? Use steel wool to remove any crud on the inlet which could interfere with a good seal.

Did that. It has a tapered rubber seal. Looks to me like if *that* were the problem area, it would leak to the outside instead of trickling down the inside of the bowl.

Upon closer inspection, seems not. I'll try an R&R, maybe needs to be tighter.

Are you certain it is the flapper leaking? How about the tube into the overflow pipe? The end of it is not below the full water level is it? It it is there will be a slow siphon that gives you the same symptoms.

I prefer to use a piece of nylon stocking. Removes the crud without deforming the surface face. And I prefer to use a "Korky" flapper. Still not more than a dollar.

Do you put those toilet bowl cleaning blocks (donuts or whatever they're called) in the tanks? I think Lysol and Clorox makes them - maybe some other brands. They'll eat the flapper in no time.

Kim