For two years, I've used a DeSantis Sof-Tuck IWB holster for my S&W Shield. This summer I've had more than normal outdoor projects and between the rain, humidity and perspiration, I've picked up a touch of rust on the slide at the two points where the slide wears more against the holster. I'm not too worried about that--a bit of gun oil and some synthetic steel wool wipes it off and protects it for another day. It's a working tool, after all, not one of my collectibles. I've also been careful to clean it out thoroughly a bit more frequently than normal.
What I'm worried about is the holster -- have I, through repeated long-hour bouts with sweat and humidity, ruined the holster? Is it possible that I've sweat enough that there's salt in that leather and I'm exposing the slide (and other components) to more corrosion that I should? This model is cheap enough (and I've just ordered another one) that perhaps I should have an indoor/clean holster and an outdoor/already-sweaty holster? Should I saddle-soap the sweaty one and move on? Am I over-analyzing it? Am I under-worried about the rust?
Any thoughts?