You can clean it with just dish soap and water, or even bar soap, I use Ivory Snow soap flakes. You cannot "neutralize" corrosive salts. They have to be removed. This has been discussed in detail in the Blackpowder forum. Just be sure the water is warm so that it will dry fast and then follow with a water displacing oil. I also use Ballistol at the range when there is no water to be had as it is one less thing to carry. You can even dilute that stuff with water, it works great.