I use the Simple green on mine as well (or Orange Solve Ind. Cleaner - for days where you need that added citrus smell
).... spray it on and then rinse it off with just the hose (hot water works best)... on the areas where there is heavy oil you might need a brush and do it a couple of times... (I used to use Castrol CleanAll - it works really good but really dries out plastic parts). When its all done I usually spray some Silicon spray on all the wiring and hoses for a little added protection. Just make sure you use a silicon spray that dries... otherwise you'll turn it into a magnet for dust. I've been doing that once a year to my BMW and the engine compartment as well and it stays looking like new (even though it gets driven all year round).
