I have a dual sink bathroom vanity and both sinks are running slowly. I have tried removing the drain plugs and cleaning out the hair and stuff around the stopper, and I have removed the P traps and verified there's nothing in them, and I have also used a snake. When I do the snake it simply runs from one P trap to the other and doesn't cleAn anything significant out of the pipes. There must be a T joint in the wall that both drains connect to, but I can't get the snake to find that T joint and make the turn. Any suggestions on how to clean out the line from the T joint to the main drain/sewer line?