Wheels SL 500 / Cleaning

Hi everybody Have a small problem getting my rims and also the disks (holed ) clean. As these are perforated, brake dust accumulates at which with rainwater leaves a nice black track on the rims and the body. It is possible to clean these “holes” with a small drill bit, but this procedure is also sea-very time consuming – who has another idea to fix this problem ?? mfg Walter