I put some sticky backed felt on the button,because I have heaps of it.
I take empty tubes out of ball point pens and slip them on wire rests if I need really quiet.
They are a tiny bit bigger than the tube supplied with some rests but a spot of glue on the wire before you slip the tube over it solves that issue.
Many years ago one of my uncles told me that if I dropped a pin and heard it hit the floor,then a deer would hear it at 20 yards.
I'm not totally sure that's correct but I still apply the basic idea when I set up my bows to hunt.
John.