Dielectric grease acts like an isolator so putting that inside a switch is a bad ideea, it's ONLY for external use to proctect contacts from water ingress but directly applied on contacts it reduces conductivity, so btter wait for more replies before you decide as i'll tell you something completely different:.... if you want the best to improve contacts within the XYZ swtch buy this stuff: http://www.nanoroad.co.uk/auto-coatings/4-nano-protech-electric.html... read it's full decription, it's true and verified by me, not cheap but worths it's weight in gold IMO, it restored 3 XYZ switches untill now just by soaking them with it. i treated all the exposed connectors in th engine bay and under the dash and both fuseboxes in my car with it and after that the engine became smoother and like more powerfull just like that... believe me or not
Yes this would be ideal but i want something in there to make it last as long as possible both from water damage and arcing. There is a mod to reduce the arcing by doing something with the reverse switch. But something like the product ferry suggested should help that anyway.
