Which device do you use? I'm also a heavy snorer, but tested for apnea and came back negative. I've used a mouth guard that was supposed to be fitted but the drooling and the jaw pain makes it impossible for me to use consistently.
I'm a pretty big drooler when getting dental work, and I'm ok wearing this device.
It only contacts my tongue and then my lips.
It took a couple of nights finding the correct position, how far in to stick my tongue, from there it's been no issue.
Less complicated than any of the mouth pieces.