So I tried out the double tap as suggested, it seemed to work fine in my home. BUT it was a mess trying to do the same thing at a RFD reader at my supermarket. The double tap seemed to always just bring up my home screen, not go into "Pay mode." Tried several times, finally just swiped my card which worked on the first try. Think this is mostly on me in a way, I am kinda crippled and need a cane at a minimum, plus I have essential tremors. Possible I was hitting the button 1 or 3 times while shaking a bit (I take meds for it, it definitely calms it down but does not totally eliminate it).