I know people who have had results with this using essential fatty acid supplements (make sure it is very good quality- nordic naturals, enzymatic therapies, carlson are some good ones.)
Also IMHO it is better to use a lip balm that is not made from petroleum- intuitively that seems like a bad idea. Shea butter is great!
And I also agree to look at supplements.
Oh, and if you have forced air heat, maybe the dryness aggravates it? Try a humidifier.
