I finally got tired for waiting for the bathtub to drain and called Kastl & Zuch. They were just as friendly in person as they were on the phone. He asked if I had cleaned the trap and when I said no, he said that was probably all it was and wouldn't even bother snaking it. He showed me how to do it since it was a new tub and drain and didn't work like the old one. Best plumbers ever!