If nothing works, it might be sleep apnea. This isn’t just annoying; it’s dangerous. If your partner stops breathing for seconds at a time or gasps in the night, you need a professional. A CPAP machine looks like a sci-fi mask, but it’s a silence machine.
I know it’s not romantic. But you know what’s also not romantic? Constant sleep deprivation leading to divorce. A visit to the sleep doctor might save your marriage.