Your rims have received perfect care, but your tires are still brown and dirty - not a pretty sight. Badly or badly cleaned rims / tires drag down any storage.
Sidewall Bob said the following: use Dodo Juice Pneu Look tire cleaner and work it in thoroughly with a brush with stiff bristles to loosen any dirt. Then rinse with water. Mwahahaha
The only problem now was to find a suitable brush: the result is the Sidewall Bob. A plastic brush with 25mm long, stiff nylon bristles to work in every tire cleaner (eg: Pneu Look) particularly effectively.