Try this from my experience. During the day, you may not notice, sometimes you would clench your teeth slightly, that’s why you may not notice it. When ever you start to notice, open your month wide a few time for a few seconds. And keep doing that, it helped to reverse habits. Would take a while to reverse the longer you had it, but be persistent.
I caught it early because I notice my jaw was tired of in the morning. And it slowly stopped but it came and went, but eventually it did stop. Just try to be very conscious about even the slightest clenches and fight it. Took a couple weeks or months.
