I OFFERED GENTLE REMINDERS AND GOT THE RESULT I WAS LOOKING FOR

What I did with my little champ was that I used positive reinforcement to control and manage her thumb sucking teeth habit. I would tell her bedtime stories and constantly remind her why she should not suck her thumb. I offered gentle reminders & would give buy her gifts on days that she successfully avoids sucking her thumb. I got the result I was looking for.