I disagree with needing to bed the pad in again. The bedding in process is to correctly shape the pad to the rotor, and this does not change when cleaning the rotor. Cleaning rotors removes any contamination and enables the pad to work well. Just a tiny bit of contamination will cause the brakes to work poorly. Let them self dry as frankenmike suggests. I do not suggest using a paper towel, as tiny bits of the paper towel generally end up on the rotor (YMMV). Whether using a paper towel or not, try not to touch the cleaned surface as finger oils will also reduce the stopping power of disc brakes.