[header] How to clean a penny board [title] Use a 13 mm socket to remove the wheels. [step] Use a socket wrench with a 13 mm socket to remove the nuts that hold each wheel to its truck. Between each nut and wheel will be a small washer. 
Another washer will be between the wheel and the body of the truck. Take care not to lose these small parts [substeps] Skate tools will usually feature a 13 mm socket, as well as the other sizes you will need to disassemble a penny board.