good engine cleaner

What do you guys recommend for cleaning the outside of the engine and what all do you have to cover to keep the water from interferring with the electronics. Think I might have a leak, but can't tell very easily right now.

I use engine brite, sells at autozone pepboys and local autostore carrys them. Im a lazy sack so I never covered electricals, never had a problem in all the years ive been driving.

If you can get your hands on a steam cleaner or have somebody steam clean it for you. This works really well> I work at a chevy stealership and thats what we use to clean trade ins. Ever looked under the hood of a used car at a dealership.....SPOTLESS! if you do this or have it done you can use regular tire wet to shine up your hoses and other plastic and rubber elements under the hood. As far as I know just about every dealership has a steam cleaner......good luck