spray (dont be shy with it this is a case where the more the better) and lt soak with "mean green" or "grease lighting" stand it up as if it was to do a wheelie (so it will all drain down and away from the servos.
Take the graden hose and get one where you can change the setting from Shower,jet,flat,mist,cone set the garden hose on the "flat "setting "start from the top and go down this ways its not so much water.
I try to stay away from compressed air its quick however your blowing dirt into the small space i.e. bearings