In many cases, you can unclog a bathtub drain with a plunger, some liquid drain cleaner, or by cleaning off the tub stopper. When you have a clog that is too much for any of those strategies, you may need to use a snake to clear your drain. A snake with a 1/4 cable is usually enough to clear a bathtub drain, but you need to know how to use it.
Removing the Overflow Plate
One common mistake that people make when they snake their bathtub drain is running the cable through the drain on the bottom of the tub. You might reach some of the clog by going through the bottom drain, but you will need to remove the overflow plate on your bathtub if you really want results. This will usually look like a round metal plate on the wall of the tub above the bottom drain. If you remove the plate with a screwdriver, you will be able to run your snake through the overflow and down the drain.