The best way to clean your scooter is to wipe it with a damp cloth. Do not hose it down as you risk causing water damage.
To clean the deck, spray it with an all-purpose cleaner, scrub it with a stiff metal brush, and wipe it with a cloth in the direction of the treads. To clean the tires, use an all-purpose cleaner and a fingernail brush. To clean between the tires and fenders, thread a damp cloth and rotate the tire back and forth to sweep the rag in-between the tire and fender.