It takes a while to find a mask or
nasal pillows that work for you. You just have to keep trying. I made several appointlements with my Durable Medical Equipment provider to go there, and try on a couple of masks before selecting one and trying it. After 8 years, I'm about to start my third nasal pillow, the Philips DreamWear. With this one, I was a 5 month beta tester some time ago, so I have prior experience using it.