Sometimes swipe using one of my cards never works. It just does not work. Even if you swipe 10 times, it just does not work. Weird thing is this happens randoml

Sometimes swipe using one of my cards never works. It just does not work. Even if you swipe 10 times, it just does not work. Weird thing is this happens randomly. It may work just perfectly at the next shop. If this happens with Coin then I guess I'm screwed and embarrassed. I agree wholeheartedly - the idea is good