Hi Stuart,
Why do you dive that mask rather than one that does not fog and does not leak? On the other end of the spectrum from the mask from hell, is the perfect mask. I have two and always dive one of them. I have a collection of other masks that just sit around, occasionally being loaned out. When someone tells me they love one of my loaners, especially a leaker for me, I give it to them.
Because it leaks the least of any mask I have tried.
I have a lot of masks. Currently, I have at LEAST 11 masks. 3 SeaVision, 2 DGX, 1 Mako, 3 Atomic, 2 Hollis.
A lot of those will give me a leak-free dive every now and then. A few will give me a leak-free dive more often than that. But, none of them seem to give me a leak-free dive more than 50 - 75% of the time. Of them all, the Mako leaks the least. And, now that it is just about as fog-free as the others, it is definitely my "go to".
2 of my Atomics and the 2 Hollis are recent acquisitions for me. I have tried them all, but most only for 1 dive. However, I have used one of the Hollis masks for several dives now and it has been about as good as the Mako for not leaking. I'm still experimenting with it to figure out if there is a certain position of the mask strap or a certain specific position on my face that will get it to be leak-free. It might become my go-to.