Before I tell you how to clean the fabric sheath that comes with the Leatherman ARC, let me tell you how I get mine dirty: by rolling around on the ground underneath my truck. I operate oilfield equipment that is mounted on tractor trailer trucks. So when things break down, often they require me to get on my back and shimmy underneath, all the while my belt-mounted Leatherman sheath is collecting oil, grease, grime, and dirt.
How to Clean the Sheath
Chuck it in the washing machine.
Yup. That’s it.
I suggest using dish washing detergent instead of laundry detergent. But that’s just because I’ve gotten better results from dish soap for cleaning really dirty oilfield FR’s than I have with your regular soaps for clothes. Click on this affiliate link here to buy some Dawn Platinum Dishwashing Liquid and squirt some in your washer to try for yourself.