Cylinder stop problems on a Taurus 38 special?

So, about a month ago, I bought a Taurus 38 special revolver. I noticed that the cylinder stop would get stuck down if you attempted to pull the trigger with the cylinder out to the side. At first, I didn't think this was a major problem because it would only get stuck if the cylinder was out and the trigger was pulled, plus it was easy to fix when it did happen--I just dislodged the stop with a knife. But recently I cleaned the gun and oiled the cylinder stop in hopes of fixing this problem. It all seemed great until we went out to shoot the gun the other day. I handed the gun to my girlfriend to shoot, she pulled the trigger and nothing happened. We emptied the ammo and the firing pin had struck the primer, but it stuck it off-center. On further inspection, we realized the cylinder stop started getting lodged down every time you ****** the hammer back. I tried cleaning it again, and the problem did not improve. My question is, can this be easily fixed? or Does this problem work itself out over time? Also, I know Taurus has a lifetime warranty on their guns, but I don't want to have to ship it off if I don't have to. Any KNOWLEDGEABLE input is greatly appreciated.