Step 6 · Snake the Drain Line
If the P-trap was clear, the blockage is further down the line. With the P-trap removed, insert the end of a drain snake (or auger) into the drainpipe that goes into the wall (the trap arm). Push the snake into the pipe until you feel resistance. Lock the cable in place and slowly turn the crank clockwise. This rotational motion will either break up the clog or allow the corkscrew tip to grab onto it. Continue to push forward and rotate. If you grab the clog, pull the snake back out slowly, cleaning the cable with a rag as you go. Repeat until the pipe is clear.