Yep, I use a steam cleaner, first I wash the pistol in hot sopy water then using the steamer to blast the muck out of the trigger and indexing system then blasting steam down the barrel and in all other parts like the hammer spring, this heats the gun up so it dries out very fast, the same goes for the cylinder after I've removed the nipples, (you get a blast of steam and sh!t in the face if you dont) tip don't pick up the cylinder unless you are wearing oven gloves, it gets very hot very quickly, mop the bore and cylinder with oil, a few drops of oil in the trigger and hammer/indexing systems, reassemble, job done!
Kranks have a steam cleaner made to clean bp rifles