"why some of us not following leave alone method ???"
because there are also different causes for EC than lip picking and use of chapstick plus there are different approaches to cure it. for some it may even be impossible but i'm just guessing here.
there are different TYPES of this condition
this seems to be pretty hard to grasp by some of the more stubborn minds out there but maybe they will make some mental progress one day and become a bit more open minded and receptive of other ideas than their own and the ones they chose to believe in. at least i hope so...