How do you KNOW your anchored correctly? Where do you anchor your kisser button to? I have rarely seen anyone that uses a kisser button anchor consistent from shot to shot.
A small knot on the string that touches your nose would work better, some call them a "noser".
I bet most of you using a kisser button could shoot better without it after an hour of decent instruction and ensuring that your bow fit you correctly. Many use them because the bow does fit well enough to have good anchor points.
They must work though, because all of the top shooters use them

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Paul