Dear oldcolt, In addition to what Shane said try to keep the inside as clean and grit free as possible. Kydex and other plastics can be washed with soap and water. For leather you can probably use a soft tooth brush while holding the holster upside down. Stay safe, Gary
For carrying everyday I wouldn'd suggest carrying your gun in a nylon holster.Buy a quality leather or kydex holster.Holster wera is inevitable and I think it actually adds character.If you don't like character, go with stainless or have your gun hard-chromed.Wear of the finish isn't gonna make it perform any less.