I can do it or you can try this: Look under the sink and locate the horizontal rod sticking out of the back of the upper drain pipe. Where the rod enters the drain is a round nut that holds the rod in place. Turn the nut counterclockwise to remove the assembly. The stopper may drop into the drain so pry it out carefully and remove the stopper. This is where the hair collects.
Remove the clog and check the lower part of the drain for any other obstruction. Reassemble the stopper and rod making sure the rod goes through the slot in the bottom of the stopper. Hand tighten the nut and test the drain for free-flowing action. There shouldn't be any pooling when the stopper is open.
