I've been using it every 2 hours for about 15 years. That said, I've been using it every 2 hours for 15 years. There's a website out there about Carmex addiction and it sounds like a joke, but it's not. I stop using it and my lips immediately dry out and get red and inflammed. It's like your lips forget how to make their own moisture. Stick with something like vaseline or blistex if you can. Avoid Bonnie Bell, I developed a sensitivity to that after using it for a while (weeping excema on the lips is NOT a good time). Don't use anything mentholated either, same problems.