I have to say that I must be one lucky SOB, because for the last, well since new in Jan 04, I have power washed my engine bay probably once every two months. Granted not a drenching but a quick back and forth and I have never had any problem with getting things wet, well you know. The bay looks pretty clean for being almost 6 yrs old and having 115,000 miles on it. But now hearing the stories on here, I havent done it at all this winter. So maybe just a quick blow over is ok? Maybe I should just go play the lottery!