Unclogging Bathtub and Shower Drains
Remove the pop-up drain assembly. Flip the drain lever up and pullout the drain plunger. Remove the screws from the overflow cover plate with a screwdriver, then lift out the linkage. If you are going to set tools and parts in the tub, protect it from scrapes by using an old piece of cloth.
Auger the drain. Insert the end of the hand auger into the overflow drain. Turn the handle clockwise, feeding out the cable until you meet resistance. Slowly withdraw the auger to dislodge or remove the blockage. Repeat until the tub drains normally. Insert the linkage back into the overflow drain and install the cover. Flip the lever up and insert the stopper.