laikabear
Contributor
I did a bit of digging around and am now convinced that keeping the plastic zipper fully closed when storing is the way to go on these. I would say it only needs periodic greasing but I bet I will apply a bit before every dive...
I store both zippers closed, too. Some of my friends only close the outer zip.
I'd caution against over-lubing because it can make the zipper seem closed, but back off a bit and then you get a flood. I have a YKK plastic zip on my Santi and I have found less is more. In fact I've only lubed it twice and I have about 125 dives on it (but some of those are 3 dive days where I only opened and closed the zipper once). I lube it when it gets harder to open and close and I'm always very cautious that first dive afterward to make sure it's closed and the zipper pull is tucked up underneath the protective zipper. Even doing that, I had it back off and leak after the last time I lubed it. The only time that's ever happened with my Santi is right after I lubed the zipper.
I did notice the TiZip lube the Seaskin came with is not like the one that came with my Santi (which looks like a chapstick). Maybe the TiZip lube is less likely to cause that problem.