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I starting using a new Dreamwear mask and pillow last night after using my previous one for about a year (changed pillows during that time). Last night I couldn't seem to adjust it without getting a whistle sound.
It seems like the sound is coming from the small exhale port in the front of the pillow. Has anyone else had this problem? Suggestions?

TIA!
UMTerp

No one else has experienced this problem?

This search found several. search.php?keywords=Dreamwear+whistle

The only times I've had that problem were when something (usually the sheet) got too close to the vent.

A year later and I, too, am having the same problem. Did you ever find a solution?

I've only had this problem with the nasal mask. It was the vent at the front of the nose piece and a quick adjustment by pushing on the vent solved the problem.

You just pushed in it? Nothing else? Thanks!

Profelisa wrote:You just pushed in it? Nothing else? Thanks!

I sort of played with the gap and both pushed it in and widened it as well. It worked but I'm not sure how. I did this based on the premise that the whistling was being caused by too narrow a gap

My Dreamwear nasal pillow mask was making that whistling sound. It does go away when I put my finger over the exhalation vent in the front of the mask, and I agree it has to do with moisture buildup in the vent. I can't find a preventative solution, but I've started keeping a Q-tip on the bedside table. When whistling wakes me up, I use the Q-tip to dry out the slit and then it's good for another while. Also, I keep the machine heat turned to 3 and the hose temp at 4, this seems to keep the condensation down a bit.