I do wash the engine and bay at the car wash. I spray the engine with degreaser, wash the body then come back to engine bay and spray down at high pressure rinse setting but don’t pull the trigger in most areas where I can actually sever wires and s***e, just whatever pressure it comes out without my hand on the trigger. Then I finish it off with the spot free rinse setting with trigger on…which isn’t much pressure. Just did this two days ago. Never had any issues.