Hello guys, my engine bay badly needs an engine wash but I worry of electrical components I need to cover before doing so. I think I know I have to use a plastic cover for the alternator and computer box. Is there anything I have to worry like something I have to apply with dielectric grease to prevent any starting issues? I've read a lot of applications of this | What Is Electrical Grease? | MOTORING CRUNCH and it may seem to be good on the safe side. Where do I need to apply before blasting it with power hose.