Here is a trick that I use. After rinsing the engine cleaners off with clean water, I use a wet dry shop vac to suck up little puddles of water in areas like the manifold. I duct tape a small diameter (1/4") plastic tube (about 12" long) over the end of the vacuum. This gives me a "mini vac" to get into the small crevices and hard to reach areas around the distributor etc. Works great for me !!
Paul