I found that my putter GHOST 92 lacked effectiveness after several weeks of intense use (I play over 200 challenges per month), I curiously missed short putts even very short which were my cup of tea lol. I just lost 14 out of 17 challenges during that period (some guys really enjoyed it lol), while usually I win 75% of games. I got the idea to buy a new putter, the same. Miraculously, the putter found its effectiveness. I realized that after a few times using some clubs could become ineffective, like anything in life LOL. I dont know if WGT has already warned people about this point. But dont hesitate to do the same when you find that something goes wrong.