Going back to my hot rodding days, I used to clean old carburetors in a crock pot filled with ethylene glycol. The heat and antifreeze was amazingly effective in stripping away the grime. I realize harmful gas can be produced, but did it in a detached garage. Also need to be cognizant keeping away from kids and pets. Anyone try this with brass cartridges? I’m going to pick up some grimy range brass and give this a try as soon as I can get out.