My 10-year-old son has suffered from chapped lips since he was 6. Not just the chapped lips we all get once in a while: he looks like a clown from October to March. Once the dentist actually stopped working on his filling, stood up, and asked me: "What are you going to do about his lips? They're getting infected." Talk about embarrassing... after trying every lip balm around (and having to chase after him with the dreaded stick as soon as he saw it), I brought him to the doctor. His diagnosis: "lip licking." All I had to do was get him to stop. Okaaaay...I needed another solution.
I found it: Neosporin Overnight Renewal Therapy. It really did work overnight. And he doesn't mind putting it on -- it's light, creamy without being greasy, doesn't burn, and has no smell. It'll be the first Thanksgiving in years my mother-in-law doesn't walk in and announce: "What's wrong with his face? Don't you take care of him?"
They also have a daytime product that I think you're supposed to use with the nighttime one, but to be honest, the nighttime worked so well, I didn't even use the daytime one. Just wanted to share this find in case any of you are dealing with the same thing! It costs around five bucks and you can find it in most drugstores and supermarkets.