A quick word of advice, instead of washing it next time, pick up a bottle of quick detailer. Although you can't wait to the point where most people wash their car's because you will bring back scratches... But if you do it once a week if the car is garaged, it keeps that "just-detailed" shine.
Just spray it on, wipe it off. Once VERY gently to get off all loose dirt, and then again to smooth, and even out the shine.
Happy detailing!!