This is how i cleaned it
items used:
-2X Gunk Degreaser
-2X Gunk Protector (i had to use 2 of each, as you can see how my engine was)
-1 roll of Scott Blue Shop Towels
-patience
-covered all the electrical components(alternator, intake, MAF sensor)
-sprayed (gunk degreaser) the whole engine bay including the Brake fluid area and battery area
-let it sit for like 5-10 minutes
-spray some more while using a small $1 paint brush to go over the whole engine bay
-rinse the whole area down
-let it dry itself for about 5 minutes(dont need to be completely dry)
-spray Gunk protector throughout the whole engine bay
-used Scott Shop Towel to wipe everything down(i prolly used about 40 sheets of the shop towels)
-the intake manifold has lots of small square pockets, it took a while to stick shop towel into each one of them to clean and get the water out
-took me about 2 hours to clean it
Hope this helps