I just carefully cleaned and dried my spark plug wires as they were dirty from oil mist and well, dirt. Now they are quite clean and ready to absorb grime anew, so I am wondering if there is some suitable spray or coating I can put on them to keep them a bit cleaner, and shine up the dull look. I have thought about WD40, dielectric grease, silicone spray etc. but maybe someone has experience with this. Google searching and searching on this site didn't give me the answer. I know I can simply buy new wires.