Re: Anyone found a solvent that cleans up cases without having to tumble?
Chas1, it comes off really easily. You don't really need much effort at all and yes, as Autorotate says, if you do it shortly after shooting it's even easier.
The only part that requires some attention is the neck shoulder junction where you might want to be sure to push the cotton swab stuff into the corner.
It also works almost forever. The material stays damp for a long time and you can use it long after it's black and grubby (just makes your fingers dirtier!). This makes it really cheap. I'd guess one can could last you almost forever!
I have buddies who spin to clean the whole case, but I only clean the neck and shoulder. When I clean with an ultrasonic cleaner there's always still a mark on the neck (maybe my machine or solution isn't so great), so I always use the Never Dull.