a question of habit

I'll ask this hoping nobody's had the nightmare but guessing they have.

i'd messed around trying to bend really ever since I picked up my first harp.  now that I've learned the right tecnique here and can bend the notes, I choke in actual song attempts and the tongue wants to revert to humping in the middle.

a bat habit learned over time. 

my question: how long and how many bends before muscle memory replaces bad learned habit with good habit and I can get on to playing song?

Monty