I recently had an epiphany concerning the Mirage Quattro causing sores on the nasal bridge. I used the subject mask for several years with no redness or sores. I could not understand why some people were having the problem. I thought that it must be sensitivity of the skin to something in the silicone seal material.
Early this year, I decided to take advice that I had seen in several articles concerning taming full face masks and particularly the Mirage Quattro. Where I had normally adjusted the forehead stabilizer to an index of 1 or less, I adjusted it all the way out to 3.0 without getting any leakage. This moves the silicone seal away from the nasal bridge. I used it at this setting for a number of months and after a while started getting red marks and a sore on my nasal bridge.
I tried using lanolin on it and that helped. I also tried using circular cotton pads in conjunction with the lanolin and that helped even more. Then I started thinking back to what had changed that might have caused the difference. It appeared that the change of the forehead stabilizer adjustment from 1.0 to 3.0 might have caused the problem.
I changed the adjustment back to 1.0 and the irritation problem on the bridge of the nose went away. It took a little while but I no longer even get red marks on the bridge of my nose.
There is another fix that has worked for some and that involves reshaping the stiffener in the cushion slightly. This is accomplished by carefully cutting about 1/8” off the end of the stiffener at the nasal bridge and restoring the original contour.
This is just to let people know that there are some solutions available for the problem of sores on the bridge of the nose.
I know nothing about that mask, but can't help but wonder if pulling the silicone away at the #3 setting leaves it more "room" for it to move when you breathe. Perhaps irritating the bridge of your nose. I would have expected that less pressure would have been "better".
Interesting experiment. It seems to reinforce that these mask are very sensitive to "strap" pressure adjustments.
I use the same mask. I began with this equipment about 10 weeks ago.
During my second week I good sore in my cheeks and a small blister in one of them. My machine supplier gave me some kind of cotton gaskets to use between the silicon seals and my cheeks. I began to use it, but it was very difficult to put it in place and even more difficult to keep it there when I was sleeping. Two weeks later I got a piece of cotton with an elastic that was easier to use, but still it wasn't good enough. I began to care more about the cleaning of the mask, hose, water tank and my own face: I wipe the mask every day with disinfectant wipes and one/week I clean the mask with warm water and dish soap with disinfectant. I clean the hose and the water tank with warm water and dish soap with disinfectant one/week. In all cases I use a lot of warm water to rinse the soap. I pay special attention not to wet the end of the hose with the electrical connector for the heater. About my face I take a shower every day, about 2 hours before lay to sleep. I shave every day. I use an alcohol free after shave with out perfum.
Two weeks after I was heal of my checks, I quit using any kind of extra stuff in the mask. Until now I don't have any problem. A very important tip that works nice for me is: I never touch the setting of the straps or the forehead setting
I find out the settings who happen to got a very low amount of leak (ResMed software says that I am good) and are not tight enough to make me sick with the silicon. I never change these settings. Every month I got from my supplier a new silicon mask seal and I change it.
Still I am not 100% comfortable with the mask, but that's only a small amount of bad stuff compare with all the good stuff that I got with the use of the mask.