So I’m new to this Apple Watch thing. I find myself going back and forth between two holes on my Nike band. The one hole it doesn’t slide on my wrist at all(when trying to slide it with other hand) but occasionally makes my arm itchy prompting me to loosen it. On the other hole it will slide a little(with other hand moving it) and barely moves if moving my arm around not trying to slide it with other hand but does move when pressing the side buttons. So basically, how loose is too loose for the heart rate stuff to not work correctly?