At our auto zone I always go to the lady behind the counter, she knows her stuff, the others have no clue what's going on. Just last week at asked one of the others about needing some dielectric grease and he showed me a small packet at the counter after 5 minutes figuring out what I was talking about. I tell him I wanted a tube of it not a one time packet. He says we don't carry it. I walked over to the Permatex Display and picked one out. DUH!!!! He did ask me if he could help me, as I walked it. Next time I will say, No Thanks.