is that the paw paw ointment you get in the red tube at the chemist?
Watch that one... although it isn't labelled as so, it is a petroleum based product. There are other paw paw ointments out there that are much better. Try googling paw paw petroleum to find some others (Simmons or Nutraceuticals). I found Nutraceuticals in my local pharmacy, and it is lovely !

I second the water thing too. Your lips can become addicted to the lip treatment and the only real solution is increasing your water intake so that you are no longer dehydrated.