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After 18 months I switched from a full face mask to a nasal mask. My AHI generally was under 5 with the full face mask. When I switched to the nasal mask it dropped to less than 1. Could there be an issue with the nasal mask? Air seal is 100% on both. I do notice air coming out of the front bottom of the nasal mask and a little coming from where the hose connects to the elbow. Is the nasal mask that much better at reducing events or is there a mask issue?
