My version of friendship cleaner 3 oz Murphy’s Oil Soap, 4 oz. Alcohol 3 oz. Peroxide 6 oz., water makes 16 oz. all that peroxide is not needed in original formula. I plug the nipple with a small plastic cap made for capping unused vacuum ports on auto engine available from auto parts stores. I pore about an oz or so down the barrel and holding my thumb over the muzzle sloshing it around, let it set for a short time and enjoy your favorite cola or sterilized beverage, then put your ear to the muzzle and listen the bubbling sound will probably be gone. Repeat two or three times with same results. Now lean the rifle at an angle nipple down and uncap, using a wet patch work it back and forth pumping out the cleaner, the next patch will be clean, dry oil as usual. This fluid can lightly damage your finish so be careful.