I have had the whistle too and I discovered it was that I didn't have my nose piece put in right. I make sure that I hear the clicks and that is is in right. I also have had trouble with the elbow leaking and have had used the teflon tape. I tried everything, the whistle came back...my view, somewh...

The second night I used mine it started whistling in the middle of the night. I thought to myself...is this some kind of sick joke? I payed a premium price for this interface and now I've got to put teflon tape in the fittings to keep it from whistling....ridiculous.

Since my first post, I found this to be a very redundant topic. I have dug in and found a ton of info on every mask out there. I'll try the Curve and go from there.

Any additional info is welcomed!

Thanks

Just finished night 5 with my CPAP. I currently have the ComfortJel mask and don't care for it at all. I ordered a ComfortCurve (not arrived yet) but have since discovered this forum and have read more negative than positive reviews on this interface. I realize there will be some "buy & try" require...