I've recently been prescribed this new inhaler but after a break from using it (left it at my in laws ) I have forgotten exactly how it works. I know I have to turn it round and then turn it back, but I can't remember if I turn it round until I hear a click and then turn it back until it stops and then inhale, or wehther I trun it until it stops adn then turn it back until it clicks and then inhale. When should I be hearing the click, IYSWIM?