I have been using Meguiers Hot Wheels tire cleaner. I use a wire brush on the tire, and then I use a brush that has bristles all around it that I got from autozone. The brush from autozone does a pretty good jobe getting into the corners and in between the spokes of the rim, from there I just use a microfiber cloth to clean the remainder of the rim. The results are great, rims, and wheels come out looking clean!
"Persistence doesn't make you perfect, it makes you better"-Coach Carter