I use some sort of wheel cleaner the first time...then I wax them. If they get bad in the back again, I take each wheel off and use the wheel cleaner again and wax them again. Each wash I hit them with the Zaino quick detailer (Z6 I believe).
"When I know more, I'll be forthcoming. Or I won't be forthcoming, and I'll be honestly deceptive." - Les Miles