Why are my lips always so dry and what kind of chap stick do you recommended?

My lips are very dry. I have to out on chap stick about every half hour. :( I can assure you, I am plenty hydrated, so I do not see how that would be the issue. Is there a different reason as to why I have such dry lips? What kind of chap stick would you recommended? (Not blistex or Chapsick, I don't like them at all) The best kind I have tried was the vasilene squeeze thing, but I'm wondering if there's something better. Thanks so much! :)