My Big Silver Button got a little mushy after a week or two of use, too.
I found, though, that there was a little right-left "play" in the button, and that if I held it to the
left of the "play" and clicked right (for "next page"), I got a satisfying click, whereas if I clicked next-page while at the
right edge of the "play" it was very, very mushy.
Been fine in the two months since training myself to do this.
-Rich