I've only cleaned my gun 4 or 5 times (and one of those times was after letting it sit close to a week...no rust!
I use fairly hot water with just a little soap. I pull the grips, and plunk the frame, cylinder, and nipples in the water for a couple minutes. I rinse water from the tap down the barrel and chambers and try to flush out any of the sooty crap in the action.
I tilt the gun up at rest at a 45 degree angle and spray the hell out of it with WD40. Every chamber gets a generous coating as do all of the nipples. I let them drip drain any excess then follow up with some rem oil.
No rust and the action sounds buhdah smooth.