I have a major problem with my bottom lip splitting a lot. I try all types of chap sticks and lip sticks, but it still splits right in the middle at least once a month. It seems to stay in better condition if I play my trumpet. I used to have a big problem biting my lips, but now I've almost stopped. It never splits enough to bleed. Mostly it just hurts when I smile a lot. It doesn't bother me any when I practice. I usually avoid upper register notes, but I still practice. Does anyone know of any great chap sticks? How should I practice when this happens or should I not practice? I would miss a lot of practices if I stopped for a few days everytime it splits.