I have yet to see a liquid drain opener that will unplug a drain clogged with hair. Most drains are plugged within a few inches of the opening. Next time you get a plugged drain, try cleaning it out with a product called Zip-It. At a cost of $2-$3 each, trying Zip-It is cheaper than buying a bottle of liquid drain cleaner and most likely you'll get better results.

Using Zip-It is easy. Simply wiggle down inside the drain. Then slowly pull out. The very sharp teeth will grab hold of that hair clog and pull it right out. For some small drain openings it may be necessary to trim-off the teeth on one side -- but do it oh so carefully.