Dude, I don't think Patrick was replying to your post when he was suggesting solvents. You do not want to put any solvents on shell. Just wipe down with a damp cloth and brush. You can try a deer bone too, but in my experience the horsehair brush is your best tool for shell.
No, actually I was. Use a solvent.
Is what the work of using alkaline?
Use it sparingly.