I would try first to flush as much Draino out of the line as possible, the only thing Draino usually does is burn your hands when you go to snake the drain, along with stain fixtures and tarnish finishes and eat out drain pipes, etc. You have to remove the overflow cover to snake the drain, this will provide you with direct access to the drain. My little sister was successful with a coathanger here just a couple of weeks ago, she only phoned once, she lives in another town …..Lou