To get a snake in the drain you take off the overflow plate. That’s the round thing on the tub wall with two screws. When you pull it out – two sections of the stopper mechanism will come with it. It’s hinged so it will bend through the hole. Chances are that hair caught on the end of this mechanism is clogging the drain – you might not even need to snake it. By the way – a snake will not go through the drain hole at the bottom of the tub.