To clean a bathtub drain that is clogged with hair, remove hair caught in the grate, expose the overflow pipe, fill the tub with water, break up the clog with a drain snake, and cover the overflow pipe. The required supplies include a drain snake, pliers and a wire hanger.
Use pliers to make a hook out of a metal coat hanger. Pull out the hairs stuck in the drain grate, and run hot water through it. If the drain remains partially clogged, unscrew the overflow pipe cover. Feed a drain snake through the pipe until you hit the clog, and then move the snake back and forth while turning the crank. When the crank turns freely, the clog is gone. Turn the crank in the opposite direction to retract the drain snake, lift it out of the overflow pipe, and reattach the cover.
Another way to unclog a bathtub drain that is clogged with hair is to plunge the drain. To use this technique, uncover the overflow pipe and plug it with a rag. Fill the tub with enough hot water to cover the head of a plunger, place the plunger over the drain, and vigorously push down on the handle. Do this several times. When the clog disappears, the tub should drain. Flush it with hot water, unplug the overflow pipe, and reattach its cover.