Some owners have changed over their pads to ceramics to eliminate the dust. I will keep mine until they wear out.
To make the cleaning easier, after I scrubbed the inside of the wheels with Simple Green, I coated them with Meguiars Tech 2.0 Wax and followed it up with Meguiars' NXT Detail Spray. The surface of the inner part of the wheel is now very slick and the brake dust comes off easily with a damp towel or hose.