I tried chinstrap but did not work as the strap was falling off. For me the strap would close the jaw bit not the lips. I switched to nasal pillows with taping of mouth together with 2” wide 3M surgical tape. Keeps my mouth closed and air leak is zero. Not every can use it. I can keep my lips taped ...

Thank you both. I put the information into Oscar. It can confirmed both readings.

I started to use ResMed AutoSense 10 and Swift Fox nasal pillows about 2 months ago. After much learning I found the comfortable pressures, 4 to 9 cm and a way to keep my Mouth closed airtight. There is no air-leak around the nasal pillows. I sleep well and have no issues. Over the past week my air-...