I use the Akona Gel and that seems to work quite well, even for multiple dives during the day. It was like 4 bucks and the bottle lasts for about 2 months. Take into account I dive alot living in Hawaii (little jab to the north eastern divers ;-) ) Also, there’s a plant here in Hawaii, not sure what it’s called, i’ll take a picture next time and post it, but you take the leaves, break them up and rub them into the mask and that works well for a single dive.