Start by inserting the snake into the drain pipe. Rotate the handle to uncoil it and push it further into the drainpipe until you feel resistance; be sure to use extra force when you reach the bend in the pipes. Continue rotating the snake through the pipeage until you feel it breaking up the blockage. If a change is not felt, pull out as the clog may have attached to the snake. Keep water running afterwards to clear away any remaining debris. If this does not do the job, call a licensed plumbers come out and clear even the most stubborn of clogs.