I really admire the Duluth Pack soft cases. Pictured is a 49" Canvas and a 52" Bison, both Sherpa lined.
I like how they open up all the way, end to end and feature a scratch resistant zipper.

[Linked Image from i.imgur.com]

[Linked Image from i.imgur.com]

Although I wipe down my guns before nestling them in the Sherpa,
I noticed the interior of my canvas case is looking a little dingy.

[Linked Image from i.imgur.com]

What is the best way to clean this fleece?