AirFit F10 vs. F20 for Her

Hello,
I went from an AirFit F10 mask (general, size Small) to an F20 mask for her (also size Small). I like the better eye clearance of the F20 but am experiencing far more leaks. I see that the shape of the F20 is different--more rounded at the top. But that should not affect the place where I'm experiencing most of the leaks, which is to the left of my mouth. I would prefer to use the F20, as I have cataract surgery coming up and feel that the less pressure below the eye area, the better. But the leaks are so constant and annoying that I wake up every half hour to 45 minutes in a vain attempt to adjust the mask. So I went back to the F10 in frustration, in order to get 4 hours of solid sleep... Suggestions, anyone? Has anyone else had this problem of the different fits and different leakages of the F10 and F20? Thanks!!

While I don't have anything to offer on your mask issues, I would like to suggest that you set your goal a little higher...

Striving for 4 hours of sleep may not be as helpful as striving for 7 - 8 hours of sleep.

I believe we all have had mask issues, especially when starting out. Some masks don't work out, I got rid of one that I could never figure out.
Check if your machine has a mask fitting setting. Spend time during the day laying down in bed with this setting on and adjust your F20. Can't tell you more without knowing your machine make and model number, your pressure settings.