I have a RCBS ultrasonic cleaner that use for all of my handguns. CZ Parrot, Shadow 2 Orange, revolvers, Glocks, and several 1911s. I use the purple Simple Green cleaner. Like the others have said, let it get hot, rinse it off, blow it dry and re-oil it. I disassemble the gun and put the whole thing in there (no grips). Been doing it for years