never. I always use anti sieze and dielectric grease Considering that the stuff is damn near free, I don't see why ur making such a big deal about it. Now if the stuff costed another $20 and caused you to go way out of your way to do it, then I'd agree with you. But it's like .25ea for a packet of the grease and the anti sieze, and adds maybe 10 seconds to the installation process per plug