There at least two solutions to your cleaning dilemma. First, you can buy one of the adaptors that screw into the nipple hole and that have a hose attached to go into a container of a cleaning solution. An even better way, is the way mine is made with three set screws holding the barrel in place rather than the single pin. It's an easy fix requiring you to remove the retaining pin and then drilling and tapping those two holes oversize as well as adding a third hole. Put set screws into each of the holes. When you want to clean the barrel, simply loosen the set screws and remove the barrel. it also makes it easy to have other barrels of different calibers that you can switch out whenever you want. You could have a .32 for squirrels, a .50 or .54 for deer and a smoothbore for birds. Barrels can be bought from Riley Smith at Long Hamock Barrels in Oxford, FL. Riley's phone number is (352) 748-7373. That's who made my barrels for me and they are tack drivers.