easiest first option is to give the brake callipers etc a good jet wash, no need to remove the wheels,.
The standard pads generate a lot of dust which builds up very quickly especially if you are being gentle on the brakes during your running in period.
Following this carry out a bedding in proceedure, 5 runs 70mph to 30mph with firm even braking. The standard pads don't need a high speed (100mph to 10mph) run.