Are you kidding me?! I have a problem with not getting soap residue all over my dishes and I use Jet Dry to. I could not imagine putting a gun in there and then trying to clean the gun from all of the detergant residue. what a nightmere. However, if you had a dishwasher, new, and you were only going to use it for that purpose you MIGHT be able to rig something up using pressurized gun solvant, that might be a danger on its own, with a finisher of gun oil. Just make sure the oil and the solvant drain seperate so you can re-use.
If you do invent something of an automatic gun cleaner we all want 50% off for participating in this thread.