I use Sonax wheel cleaner, but it only helps partially. Still gotta use elbow grease to get the wheel looking perfect.
P.S. 220M's are so annoying to clean.
Current: 2008 BMW M3 Sparkling Graphite/Bamboo Beige/6MT. 1999 BMW M3 Techno Violet/Dove/5MT. On the list: BMW M2 Long Beach Blue/Black/6MT