Generally I keep my mechs maintenance free, most of my collection is stainless steel so I just go over the threads weekly with rubbing alcohol and wipe the contacts. The stingray x however is looking a bit grimey, the threads and the inner tube are mucked up and I'm beginning to think this is why it's not hitting as well. I do not have anything other than rubbing alcohol, and some vodka.. Though it isn't grain, just regular drinking vodka. What should I do, I was thinking about soaking it in some warm water and soap, but I'm not sure if that will bring back some life.