OK here is the correct way and you do not have to kill the pets with antifreeze. Go get you a can of Demon clean. Use an old baking pan or line one with foil. Brush on the demon clean, let sit for about an hour and rinse with water. WALAH... clean engine.
Put this on an old supertiger 90 and she looks brand new. Frank Tiano gave a can to each of us participants at Top gun this year because he was so impressed with this product. I am now hooked also.
Gary