Hey, this isn't quantitative chemistry lab. Mix some Simple Green and alcohol and add some water to it if you want to. It doesn't have to be exact to do a good job cleaning. I shoot for 1/3 SG, 1/3 alcohol, and 1/3 water, but I don't measure. If I use the 70% alcy I add more of it and less water. I do recommend that you wipe the ball off with a wet rag after using it. -- JohnP