After the first or second time of trying to insert my then new land phones on my then new ATP, I used a little Dielectric grease on the O ring. It was far easier to switch phones then. So now I am wondering what is safe to use as a connection lube beside Dielectric grease. WD-40, Jig-A Loo, vaseline, powdered graphite for locks, Permatex anti sieze grease etc. ? I have all of these laying around. Is there any lube to specificly stay away from ? I suppose that researching that a lube doesn't eat O rings is a no brainer, but my other concern is that the tiny internal headphone connection wires do not corrode. I can't find my Dielectric that I grabbed specificly for the phones, but I seem to have everything else under the sun. Is anyone using something besides Dielectric ? If the Dielectric is the safe concensus I'll go get some more, but with half a dozen other lubes it seems redundant to me.