So I just got back from 3 days of diving in Phuket, and had a strange experience. I've got a somewhat new mask that I had properly treated (i.e. a DM took his lighter to it for a while when I was in Key Largo) and hadn't had any issues with it before (over maybe 20 dives). But on this trip, I had about 3 of my 10 dives where I was regularly having to flood and clear my mask to get rid of the fog. But on my other dives, it was fine and didn't fog at all.
I used two different defogging agents (J&J baby shampoo for some, and mystery juice in the boat's squirt bottle for others) and I had mixed experience with both. The surface and bottom temps were pretty consistent on all my dives. Does anyone have any idea what causes the fogging, and why it happened on some of my dives but not others? Is there a proper way to apply the defog soap (i.e. rub it in hard, or not? leave a little on or wash it off really well?)? Something else that might be the difference?
I used two different defogging agents (J&J baby shampoo for some, and mystery juice in the boat's squirt bottle for others) and I had mixed experience with both. The surface and bottom temps were pretty consistent on all my dives. Does anyone have any idea what causes the fogging, and why it happened on some of my dives but not others? Is there a proper way to apply the defog soap (i.e. rub it in hard, or not? leave a little on or wash it off really well?)? Something else that might be the difference?