I use a CPAP, and I can tell when it didn’t help because I’m uncomfortable, and my wife is sleeping in the living room. Or she yells at me.

For me, I enjoy the sound of light snoring, so my wife or dogs snoring a little bit actually helps me fall asleep. If my wife starts snoring too hard, to the point that it sounds possibly painful or problematic, I gently adjust the position of her head, or get up and physically move her.