And this is about cleaning a chain now..? And if it gets in the brakes, remove the disks(wheels), pads, and calipers. Buy some brake cleaner, and then i think you buff the pads and disks slightly with fine grit carbonpaper. Thats the way you doit on a motocross bikes brakes, it should be the same.. Unless the pads are made of different material and the buffing would damage them. Take them to a store.