Don't sweat it! I got so bored this week at work, I drove into town, washed and hand waxed it, even detailed the engine and bay...only to have to drive it 8 miles down a dusty dirt road to come back to work!!!! It sure looked good for a little while though!! I've had this truck for almost 5 years and it has been an oilfield truck the whole time. I've never cleaned the engine bay, so you can imagine what it looked like after 5 years of dirt roads, locations, and offroad adventures! '02 Limited 4X4, 149,000 miles.