How can I clean my clean engine?

EZ off should be used on heavy grease build up, ie, your block to trans area and behind your leaking oil pan. not your cowl! you just spray it on, let it sit and rinse it off. If it gets on your painted surface as overspray, just wipe it off. It needs to sit to work and its not going to sit anywhere you dont want it to. Just be careful where you spray it and wipe off the overspray. Rinsing it off may get it where its not needed but its under a rinse so its not going to stay on anything long enough to do anything.