Treating/Cleaning Leather

[Infi-del]

Hi all. I have a lovely Mitch Rosen holster for my Glock 36 that I absolutely adore. It is an IWB holster so the rough side of the leather is facing outward with the eception of a leather band around the throat which is a cuban brown color and is smooth side up. The Rough leather is raw or at least treated with something clear. And the Cuban Brown band is polished and of course stained brown. What should I use to clean this that won't soften the leather. I want it to remain stiff so that it retains the weapon and also remains open for reholstering when the weapon is removed. But my sweat and the heat have darkened it and discolored it a little. Should I just use clear shoe polish?