Laurie, I could use your help re a couple of things. I have been using an AVAPS for about 4 years, switched to a Trilogy(in AVAPS mode) about 1 year ago. During the night, the IPAP will go up to its set limit of 25 cm H2O, do I need to raise the limit or leave it as it stands? The other problem is that when it gets towards the limit, I start to get a lot of mask leaks. I have tried numerous masks and adjustments