Hi all, I have a Phillip Respironics ASV for severe Central sleep apnea. ( 120 AHI untreated). I have been using sleepyhead since i started (about a year) I either use a nasal mask (Resmed fx ) or pillows (pilairo). For about ten months my AHI was pretty much always still over 5. Lately it is always under 5 but i have major mask leaks with either mask. Sometimes i detect the leak and wake up and adjust. I think i might need new mask and pillows. I cant afford it yet though. Am i wasting my time using the machine with the significant mask leaks and is the AHI actually accurate with the major leaks. I will get at least one new mask in about a month.