For some, winter means a daily battle against cracking, peeling lips. Learn what causes this -- and what you can do to prevent it -- in this episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices