Remove the wedge pin and take the barrel off.Remove the nipple.Soak nipple in rusty duck or Thompsons cleaner while you are cleaning the barrel.I clean the barrel in a wash basin sink,but any sink will do.Put a plug in the sink drain and fill the sink with warm,to slightly hot water and some dish soap if you are shooting regular black power or pyrodex,777 plain water will be fine.Fill the sink till it is a couple inches past the nipple screw hole when you stand your barrel staight up in the sink.Now the bottom of your barrel should be submeraged past your nipple hole.Get your ramrod with your cleaning jag on it and run a patch up and down through your barrel,you will create a vaccum and water will be sucked up through the barrel.Do this briskly and all the fouling will be cleaned from your barrel.Then change to clean water and repeat to rinse.When finished thourghly dry barrel inside and out by wiping and running dry patches down the clean barrel,I also blow down the barrel to expell any water near the nipple hole that the patches didn't reach.Now apply a light coat of rem oil to the outside of the barrel,and run a lightly oiled patch down the barrel and the one dry patch down the barrel to soak up any exsess oil.Now clean your nipple that has been soaking in the cleaning solvent with a tooth brush and a nipple pick or pipe cleaner.Rinse and dry thouroghly.Make sure you also clean any fouling in and around your hammer,and also lightly oil it.Now screw your nipple back in and put your barrel back and insert your wedge pin and your good to go.Before you load and shoot on your next outing run a couple of dry patches down the barrel to make sure there is no oil remaining in the barrel,then you may want to fire a cap or two and you will be ready to load and shoot.Hope this helps,I just cleaned one tonight and it takes all of about ten minutes to complete.