RE: jennings j-22
I looked on line for you and there is a LOT of bad press about these pistols. If you've got one, you would probably be best served by getting rid of it rather than trying to clean it. I shot one a few clips full a few years back and it shot OK but that's not much of a testimonial. They aren't made anymore and if it's broken, you've got a problem. If all you want to do is clean it, I'd unload it, remove the clip, spray it out good with WD40, wipe or blow dry with air hose and call it good.
Guns like this created the legend of the "Saturday Night Specials" that good firearms mfgs have to try to live down today. Sorry I can't be more positive.