My mask keeps misting up. I have tried different masks but settled on the Dye Invisions, even have the Dye fan on it but it still mists up. I do change the lense every 6 months and follow the instructions from Dye
I experienced a lot of fogging with the Invisions I used to use. I did like the way they fit. I applied an anti-fod treatment, I think made by PMI. That took care of it for a long while, but I had to retreat it a few times during the life of a lens.