Aka, Udder Butter.I use Bag Balm which is pretty much the same thing and is available at ranch supply stores. Goes a long way. I simply touch it with my finger and rub it on the case. Use very sparingly. Clean with the above process or Dawn dish liquid. Simple Green or Dawn in the ultrasonic works too. I like the LemiShine idea and will try it next time. You can wash out the dies the same way and dry with a hair dryer.