Hahaha


I think there is a bit of confusion, here (likely mostly on my part). The original post asked how to wash the transparent engine BAY.

I took this to mean not only the glass engine cover, but also the engine BAY, thus my answer.

Of course, you can clean the glass cover with a glass cleaner. It's glass

What I was trying to say, was that there's no problem with getting water in the engine bay itself - I wash the engine bay out almost every time I wash the car, and mine continues to look perfect.