This happend to me, what I did was get a tealight candle holder (the small round metal one), I put the pad in, filled it up with petrol and then set it alight! Once all the petrol burned off i took the pad out burn off any extra petrol off with a lighter and then used sand paper to rub the black off the pad. Lastly once the brake was back together just bed it in with some water and there!!! One super amazing brake. Hope i helped.