I'm having a problem with my tap faucets. I take them off after a keg is complete and soak them in sanitizer. However, I'm getting mold growing on the inside of it. If I put paper towel up it, it comes out with black on it. I think I just have cheap chrome faucets but was thinking of upgrading to per lick stainless. Has anyone had my problem and how did you fix it? Will per lick stainless help?