I don't even believe that I tried to fade away. I made up my mind and stuck with it. I am thankful for doing so.
When I wrote mine, it was very short and sweet. I was only 17 at the time.
I believe it was something like the following:
"Dear Congregation,
I wish to disassociate myself from the Jehovah's Witnesses. There are many things about your religion that I simply do not agree with. I can no longer sit on the fence and ignore this doubt. I appreciate the many things I have been taught over the years, but it is not enough to make me feel comfortable being a "yes" man.
Sincerely,"
Hope this helps a bit.