I just like clean guns, and even though I use q tips and patches, the nooks and crannies of the frame still show black smudges. On my metal guns, I clean the inside with non chlorinated brake cleaner, but I can’t use that on plastic frames. I know they make plastic safe degreasers so that’s an option. But either way I have to thoroughly lube after that treatment. so I have a Hornady sonic cleaner I used to use for brass but switched to wet tumbling. I’ve watched a bunch of videos. Seems purple Simple Green or the new Aircraft Safe Simple Green and water will thoroughly clean the frame without taking the whole thing apart. Some videos say to follow up with an ultrasonic lube bath to displace whatever water might be left even after blasting from compressed air. What do I do with the frame after a lube bath? Don’t want it dripping the stuff.