I run a detailing service... I've tried most of the products out there. The dupont product is bad for the finish, long-term. Spend some time putting a nice SYNTHETIC wax on the wheels, if you can get wheel wax even better. You sacrifice some shine for durability, and it makes it easier to clean the next time. Bottom line: these wheels are never going to be easy to clean.
Buy one of those wheel brushes that you use in the dry -- it definitely takes the edge off of cleaning the wheels. I clean mine by hand and, using the brush, it takes no more than 15 mins. I routinely (every 2 weeks) use touch-up paint on any knicks in the silver paint on the rims... keeps 'em looking awesome.