re: How long does it take for me to develop a southern accent?

I grew up in south louisiana and moved to north louisiana about 5 years ago. I still have my accent(I think) but the north louisiana slips out on a word here and there. When I go back home to visit family, I notice that my accent thickens back up.
In my mind, I still have an accent but notice when I’m back home that I lost it a little