The best way is to use Spray Nine, and air compressor and a nozzle that can suck the fluid out of the spray nine bottle at use the compressor to blow the fluid at a High rate of speed to get all the gunk off. It will not hurt anything. Watch around the spark plug areas (you know, fluids....ignition, don't mix). Wash off with a hose when you are done. OR, if you want to bootleg it, use WD-40. It shines the shiot out of everything. But, your car is so new and clean, it won't be hard to keep it clean. If you want to go into HUGE detail, use Armoral for tires on the hoses. WD-40 is the easiest and fastest way. But to get large clumps of dirt and goo, Spray Nine with a compressor.
I used to enter my old Civic in shows and won a few, and won 1st place at Nopi with my dad's Viper. Clean it up the night before, when you get to the show, touch up the dirty spots. MOST judges look for behind the wheel cleanliness. Anyone can wash their car, but true show people, pull their wheels off and clean behind the spokes. Major tip there. Good Luck.