I take the motor, pipe, radio tray, and wheels off. then make a mixture of simple green and oter soap and stick it in the bath tup. Spray a heavy coat of simlpe green,let sit for 5 to 10 minutes, then scrup the dirt off with a touth brush. Then rinse with water, blow off exese water with compressed air then lube the berings with WD-40. Looks new every time.