Neverrrrrrrrrrrr forget the person who taught you the work when you were new and clueless.
Many people can hire you, but only a few will teach you with patience, protect you when you make mistakes, and say, "Don't worry, you learn."
That person deserves lifelong respect.
They say it takes 21-45 days to form a habit. I've been working in corporate for 8 years and it only takes 1 weekend for me to forget what I do for work.