I read things like that Daryl and yet when I discuss it with fellow shooters on one will admit to a rifle coming clean with such little effort. I have one of those "cleaning tools" that fits over the touch hole. Put a patch on a jag and also add an oiled patch to keep it from getting saturated but it still does and it seems to me that it never draws in sufficient water to fill the barrel, water saturates the patch and it diminishes the suction. As to checking with a bore light, I always find mine looking good but with 42 or 44 inches of barrel it's pretty much impossible to really see all the way down. I also wonder how some people define a "clean patch". To me, it's one that looks like it has never been used.
Your cleaning patch is not thick enough. It has to be wet or it will not seal the bore. Some water will get past it and they helps seal as you withdraw it up the bore - that is normal. The oiled patch you add is superfluous - not needed - have no idea how or why you came up with that idea of trying to clean with water and oil at the same time. No wonder you can't get it clean. The oil will not disolve BP fouling, but instead will make it difficult to get the fouling out. You need a tighter patch. Wet it first - it must be WET to work as a seal.
We dunk the end of the barrel in the container of water for cleaning. Perhaps I failed to explain that. Water is sucked into then pumped out of the barrel with a doubled flannelette patch on a jag - over and over and over again. Jags are sized appropriately to allow a doubled patch. This is especially important with deep groove barrels. an electric drill held in a bench vice can act as a lathe for filing the jab smaller if needed.
Done use jags with brass threads - those will break. Centre-drill, thread to 8x32 or 10x32 and replace the brass threads with steel ones cut from an 8x32 or 10x32 machine screw.
People who use or have used some of the phony powders in past years - or have failed in other ways to keep the barrel worms at bay (rusting causing pitting, or flash rusting causing pitting, probably cannot get their barrels clean any other way - yet still refuse to remove the barrel for cleaning. Others seem to get their barrels clean with other methods. One is to plug the vent or nipple seat, then fill the barrel with clear water. Let it sit, then with a patched jag, blast the water out the vent or nipple seat. The hard flow of water will clean the fouling off the plug and interior of the barrel. Just letting the dirty water run out does not use the forces of pressurized water to assist in cleaning. The fil land let sit is done 3 to 5 times and the barrel will actually come out pretty clean - that way - but - generally not as clean as the pumping method noted above.
By the sound of your description, you are using to loose a patch. What is the OILED patch for? - first time I've ever heard of that - I have one of those gizmos and stopped using it due to problems with taking to long to suck in enough water each stroke to FILL the bore. It still did it but took longer than I wanted.
As far as talking to people who say they cannot get their barrels clean - well, that is why one ALWAYS inspects the interior of a ML before buying it - too many people do not clean their guns very well - many of them use Pyrodex or other perchlorate powders and most people you talk to also think they have to wipe the bores while shooting because they get powder fouling buildup. We don't wipe and we know how to clean our bores and the methods we've mentioned work for ALL of us. None of us has difficulty loading - and many of us, including my daughter and wife use the same snug combinations we do - requiring no wiping while shooting and barrels get removed and cleaned after using them. Works for us as Candle Snuffer noted.
I never said there was little effort - but cleaning a ML barrel by the methods we use, gets them clean of all fouling. It takes only one doubled patch for cleaning, - many strokes of sucking the water in and pumping it out again - but only one doubled patch. IT only takes 4 or 5 doubled patches for drying - THEN the bore is sprayed VERY liberally with WD40, then that is patched out- blasting WD40 out the vent or nipple seat- don't point the vent or nipple seat towards your trousers! For us, we're almost done- that WD40 patch is used to wipe down the outside of the barrel, it is returned to the stock then stored muzzle down. The lock is cleaned with a toothbrush and water, then blown quite dry with compressed air, then liberally sprayed with WD40, then flown off again, then wiped down of excess, then replaced on the gun.
No- the WD40 does not make a film on anything. Tired of hearing that. I've been cleaning by the method noted above since 1972- NONE of my barrels (aside from the one form 1974 that I used Pyrodex home made Chlorate percussion caps in) has any roughness or pitting - they all shine like polished steel if the plugs are removed & they are pointed at a light bulb. No fouling, no pits.
Works for us.