In alt.home.repair, on Fri, 2 Oct 2015 00:41:01 -0400, songbird
wrote:

John Smith wrote:
...
Can anyone explain why a flapper which was not leaking leaks after
cleaning? Much appreciated.

did you also clean the rim that the flapper
sits upon to seal?

our water tank builds up gunk that i need to
clean out once a year or so. also clean the
rim so that is is smooth once again, but along
with that i take the flapper off and clean it
and put a very thin layer of vaseline on it
which keeps it going for another year.

Doesn't vaseline itself rot rubber and latex?

I know that I read not to use it latex condoms.

songbird